handcuffs
Enable an AI agent to recognise handcuffs, assess their condition and restraint state, and determine which handling, maintenance or use actions are appropriate and authorised.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise handcuffs, assess their condition and restraint state, and determine which handling, maintenance or use actions are appropriate and authorised.
A two-cuff mechanical wrist restraint in which each wrist is enclosed by a lockable, usually ratcheting, bow joined to its pair by a short chain, hinge or rigid bar, so the wearer cannot separate the hands or open the bows without a key or cutter.
It can be Identify the handcuff variant and retrieve its applicable instructions.; Inspect each cuff, lock housing and connecting element for recorded defects.; Verify closure, secondary locking and release behaviour using the documented inspection procedure.; Assess documented fit compatibility and record wrist-contact concerns when applied.; Clean, maintain or quarantine the device according to its instructions and observed condition.; Support an authorised decision to apply, adjust or release the device using the relevant human oversight and procedure..
Distinguishing features
Determine whether the device provides two linked wrist-enclosing restraints; compare with a single cuff or an unconnected wrist loop.
Check whether its documented purpose is restricting independent hand movement, rather than decoration, exercise or support.
Distinguish handcuffs from leg irons using documented intended anatomy and fit range rather than appearance alone.
Distinguish functional restraints from toys or replicas using documentation and verified mechanism behaviour rather than material or styling alone.
Determine whether a flexible restraint is specifically configured for paired wrist restraint or is a general-purpose tie being used that way.
Scope
+ Identification of linked wrist restraints and their intended function
+ Wrist-enclosing components, connecting elements and supported configurations
+ Closure, locking, release and any secondary locking features
+ Documented fit limits and observed contact with wrists
+ Mechanical condition, cleanliness and readiness for service
+ Device-specific compatibility, instructions and restrictions
- The restrained person's identity, medical history and clinical assessment
- Legal grounds for detention or restraint
- Operator qualifications and organisational restraint policy
- Restraint tactics, transport procedures and custody management
- Leg irons, body restraints and combined restraint systems as complete devices
- Standalone keys and maintenance equipment as independently managed objects
Characteristics
- Intended function
- Wrist restraint; training; replica or toy; other documented purpose; unknown Appearance alone does not establish suitability for restraining a person.
- Connection construction
- Chain; hinge; rigid connector; flexible connector; other; unknown The connection affects relative cuff movement and which components require inspection.
- Permitted relative movement
- Angular travel in degrees and separation in millimetres, with measurement conditions Records the movement allowed by the device without assuming that construction labels fully describe it.
- Usable opening range
- Millimetres, specifying circumference or opening dimensions, cuff side and source Supports fit assessment without conflating opening geometry with an approved wrist-size range.
- Closure mechanism
- Ratchet; fixed-position closure; flexible one-way closure; other; unknown Determines how closure state is represented and which documented checks apply.
- Per-cuff closure state
- Open; closed with engagement unverified; closed with engagement verified; indeterminate The two cuffs may have different states, and apparent closure may not prove engagement.
- Secondary lock state
- Absent; present and disengaged; present and engaged; state unknown; malfunction suspected Any feature intended to restrict further closure or otherwise change lock behaviour needs its own verified state.
- Release compatibility
- Link to documented compatible key, release tool or manufacturer-specified release method A visually similar key or tool should not be assumed compatible.
- Wrist-contact condition
- Not applied; assessed with recorded observations; concern reported or observed; unassessed Connects device fit observations to review or escalation without asserting medical safety.
- Service disposition
- Unassessed; available under documented criteria; inspection due; quarantined; retired Separates physical operability from permission to return the device to service.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 28 questions.
Restraint identity Establishes what device is present and whether it belongs within the handcuffs concept.
Similar-looking wrist objects and restraints can have different purposes and capabilities.
Functional boundary
Separates handcuffs from adjacent restraint and non-restraint objects.
Paired wrist restraint
Record evidence that the object is intended to enclose and link two wrists to restrict independent hand movement.
- What evidence identifies this object as a paired wrist restraint? definition
- Is this a standalone handcuff device, a replica, or a component of a larger restraint system? boundary
Variant identification
Connects the physical device to the correct product variant and documentation.
Device and documentation match
Record markings and distinguishing construction details sufficient to judge whether instructions apply to this device.
- Which manufacturer, model, revision or other markings can be read on the device? provenance
- Which documentation matches those markings and the observed construction? provenance
Wrist enclosure and linkage Describes the geometry that encloses the wrists and connects the cuffs.
Fit and permitted movement depend on both cuff geometry and the connection between cuffs.
Enclosure geometry
Records opening dimensions and documented fit limits for each cuff.
Opening and fit envelope
Keep measured opening dimensions distinct from any manufacturer-stated fit limits.
- What minimum and maximum usable opening dimensions are documented or measured for each cuff? measurement
- What documented limits determine whether a wrist is outside the intended fit range? boundary
Connection mobility
Records the joining construction and the relative motion it permits.
Linkage travel
Describe the connector and its observed travel without inferring restraint performance from its category alone.
- What chain, hinge, rigid or flexible elements connect the wrist enclosures? definition
- What separation and relative rotation does the connection permit under stated inspection conditions? measurement
Closure, locking and release Records how each cuff closes, maintains its state and can be released.
Closure, secondary locking and release readiness are distinct properties that cannot be inferred from one another.
Per-cuff lock state
Tracks closure engagement and any secondary locking feature separately for each cuff.
Verified lock behaviour
Record observed states and the evidence used to establish them, including any uncertainty or malfunction.
- What is the closure engagement state of each cuff, and how was it verified? measurement
- Does this variant have a secondary lock, what does its documentation say it does, and what is its current state? definition
Release readiness
Connects the device to its documented release method and available compatible equipment.
Compatible release means
Record release compatibility and verified availability without assuming keys or methods are universal.
- Which source identifies the compatible key, tool or release method for this exact variant? provenance
- What release-readiness check is required before this device may be used? action
Integrity and serviceability Assesses defects and contamination that affect wrist contact or mechanism reliability.
A cuff can appear intact while having a hazardous contact surface, damaged connector or unreliable lock.
Restraint component integrity
Inspects wrist-enclosing parts, lock housings and connecting elements.
Component defect evidence
Record the location and nature of damage, wear, rough edges or abnormal movement against applicable inspection criteria.
- What defects are visible or detected in each cuff, its lock housing and the connector? measurement
- Which documented defect criteria require removal from service or specialist inspection? action
Cleaning and maintenance
Determines which treatment is compatible with wrist-contact surfaces and locking components.
Maintenance disposition
Record contamination, completed treatment and the evidence supporting return to service, quarantine or retirement.
- What cleaning or maintenance procedure applies to this variant's contact surfaces and lock mechanism? provenance
- What inspection or treatment remains necessary before the device meets its documented service criteria? action
Applied state and action constraints Connects observed device state to fit review and externally governed action decisions.
Mechanical readiness alone does not establish acceptable fit or authorisation to restrain a person.
Wrist-contact assessment
Records fit observations for each applied cuff and refers concerns to the relevant human assessment.
Fit observations and concerns
Record who assessed each cuff, when, and what contact or discomfort concerns were observed or reported.
- What fit and contact observations were recorded for each wrist, by whom and at what time? measurement
- What applicable procedure determines the response to reported discomfort, visible concerns or an uncertain fit assessment? action
Permitted device actions
Links proposed handling or use to device instructions and the external authority governing the situation.
Action prerequisites
Record the prerequisites for a proposed action and unresolved constraints without treating device ownership or operability as authorisation.
- Which device-specific instructions constrain the proposed application, adjustment, release or maintenance action? action
- Which external policy or authority governs this action, and have its required prerequisites been established? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Chain-linked metallic swing-through handcuffs (the common double-strand patrol pair)
- Hinged metallic handcuffs (bows joined by a hinge instead of chain)
- Rigid-bar handcuffs / speedcuffs (bows fixed on a solid bar)
- Disposable polymer flex-cuffs (single-use nylon ratchet loops)
- Soft fabric or padded wrist restraints (clinical, psychiatric or some transport use)
- Oversized / large-wrist metallic cuffs
- High-security or restricted-key metallic cuffs (non-universal keyway)
- Which of these kinds and varieties hold for the sense of handcuffs this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q19131 - Item for handcuffs as a physical restraint device.
- NIJ standard class - NIJ 0307.01 - US Department of Justice performance standard that still names the metallic police-cuff product class.
- Manufacturer model codes - e.g. Smith & Wesson 100; Peerless 700/710; ASP chain/hinged models; Hiatt/TCH Speedcuffs - De facto procurement identities; most North American chain cuffs also share a near-universal blade keyway.
- Which of these identifiers and schemes hold for the sense of handcuffs this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- NIJ Standard-0307.01 Metallic Handcuffs - National Institute of Justice, U.S. Department of Justice (1982; still the cited US product standard).
- United Nations Standard Minimum Rules for the Treatment of Prisoners (Nelson Mandela Rules), Rule 47 - UN General Assembly resolution 70/175 (2015), on instruments of restraint in custody.
- Regulation (EU) 2019/125 - European Parliament and Council, trade controls on certain restraint devices as potential torture goods, with exemptions for standard police handcuffs meeting specified criteria.
- National police and corrections use-of-force / prisoner-transport policy (not a product standard): e.g. UK College of Policing authorised professional practice; agency policy in the United States implementing constitutional limits on seizure and restraint.
- Which of these standards and regulation hold for the sense of handcuffs this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Street arrest: applied to the wrists, usually behind the back, once a subject is controlled standing or on the ground.
- Prisoner escort and vehicle transport, often combined with a waist chain, 'black box' cover or leg irons.
- Court production, holding cells and jail intake.
- Military police and private detention/security where local law allows.
- Hospital or psychiatric settings when a person is in custody, or as soft clinical restraints rather than metal cuffs.
- Training with issued or inert cuffs; also a large non-police novelty and restraint-fetish market whose locks are usually not built to NIJ.
- Which of these real-world use hold for the sense of handcuffs this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Mass of a metallic pair - 280-420 (chain); 350-500 (hinged); 400-650 (rigid) - g
- Inside wrist opening (adjustable ratchet range) - about 45-85 - mm
- Span between cuffs - about 40-60 (two-link chain); near 0 (hinge); about 50-70 (rigid bar) - mm
- Connector tensile load (NIJ 0307.01 minimum) - ≥2200 - N
- Which of these typical measurements hold for the sense of handcuffs this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Progressive tightening during a struggle if the double-lock is not set, causing ischemia and nerve injury.
- Handcuff neuropathy, typically of the superficial radial nerve (also ulnar or median) from over-tight or prolonged application.
- Escape by shimming the ratchet pawl, picking, or use of the near-universal key used on most US-pattern cuffs.
- Slip-off on small wrists, or a cuff that never ratcheted past the first teeth.
- Bow, rivet or chain failure under extreme load or after corrosion.
- Soft-tissue cuts and delayed removal with flex-cuffs, which need a cutter.
- Positional asphyxia when behind-back cuffing is combined with prolonged prone restraint or hogtie.
- Wrist, shoulder or rotator-cuff injury when the cuffs are used as a twist/pain-compliance handle.
- Lock seizure from grit, paint, ice or corrosion; broken key left in the keyway.
- Which of these failure modes and hazards hold for the sense of handcuffs this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- United States and Canada: chain and hinged swing-through cuffs dominate patrol issue; a shared 'universal' keyway is normal; NIJ 0307.01 is the product reference.
- United Kingdom, Ireland and much Commonwealth patrol practice: rigid speedcuffs (historically Hiatt/TCH) are the usual issued street cuff.
- Some European and other forces prefer hinged cuffs to limit the twisting that chain cuffs allow.
- EU dual-use/anti-torture trade rules treat some restraint types more strictly than ordinary police handcuffs.
- Ordinary-language names differ: menottes (French), Handschellen (German), esposas (Spanish); UK speech often just 'cuffs' or 'speedcuffs'.
- Pre-ratchet Darby or screw cuffs survive in museums and a few obsolete inventories, not in current patrol issue.
- Which of these regional variation hold for the sense of handcuffs this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Leg irons / ankle cuffs - Sized and chained for ankles, not wrists; longer connector; different bow diameter.
- Thumbcuffs - Encircle the thumbs, not the wrists; much smaller bows; often treated more strictly as a potential-abuse device.
- Improvised cable ties / zip ties - Not a lockable police cuff: no double-lock, no standard key, not built to NIJ tensile/cycle tests; removal is by cutting.
- Waist chain / belly chain / transport belt - A torso anchor that a pair of handcuffs may be clipped to; the chain itself is not the wrist cuff.
- Clinical limb holders - Soft or padded, used under medical protocol; typically quick-release or two-finger check, not a ratcheting metal bow.
- Historical shackles (Darby, barrel, screw cuffs) - Closed by a screw, rivet or padlock rather than a swinging ratchet bow and pawl.
- Hobble / ankle-to-wrist strap - Links a leg to a wrist or binds the ankles; it is a hobble, not a pair of wrist cuffs.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of handcuffs this model covers, and on what evidence? provenance
Sources
- Metallic Handcuffs: NIJ Standard-0307.01 - Product definition of metallic police handcuffs, double-lock expectation, and the 2 200 N connector tensile minimum used in US procurement.
- United Nations Standard Minimum Rules for the Treatment of Prisoners (the Nelson Mandela Rules), Rule 47 - International custodial limits on when instruments of restraint may be used, and the ban on inherently degrading restraint methods.
- Regulation (EU) 2019/125 concerning trade in certain goods which could be used for capital punishment, torture or other cruel, inhuman or degrading treatment or punishment - EU trade controls that list certain restraint devices (including some handcuffs, thumb-cuffs and related gear) as goods of torture concern, with carve-outs for ordinary police cuffs.
What the second pass must settle
- Does the registry intend handcuffs to include disposable flexible wrist restraints, training devices and nonfunctional replicas, or should some be linked to neighbouring entries?
- Which manufacturer documents and applicable standards provide defensible fit, inspection and retirement criteria for the variants this model must cover?
- How should a measured opening be related to wrist fit without inventing a universal clearance or safety threshold?
- Which secondary locking behaviours and release compatibility distinctions require separate representation across supported variants?
- Where should responsibility sit for recording applied-fit reassessments and urgent concerns across the device, person and restraint-event models?