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Prison Handcuffs-1K52

To securely restrain prisoners under escort by linking two wrists together.


The basic wrist locking unit (1K56) consist of a steel shackle sliding in a cast aluminium body similar to an open shackle padlock. When fully extended, the shackle can be made to hinge back to provide access for the wrist. Locking is achieved by rotating the magazine of a conventional AVA mechanism which drives ball bearings into recesses in the shackles. The more familiar double handcuff (1K52) comprises of two such units attached through chain links and a swivel link to provide flexibility of movement.
Handcuff units are key retaining in the unlocked condition. In use, shackles are closed onto the wrist, the key turned (anti-clockwise) and removed. Release is the reverse of the above procedure.
9 or 10 slider AVA mechanism affording a very high number of differs and keys unique to this application viz:-
The standard version has nine sliders and a shorter than standard length bit; the special ‘H’ version has 10 sliders on a standard bit length, but with one thinned down wing – neither blank being available on the commercial market.
NOTE: ‘H’ version identified by step in conical recess of magazine cap.
False notching and common internal profile on sliders to deter manipulative attack.
Key retaining mechanism to ensure that handcuffs cannot be left unlocked with key removed
Magazine retaining cap designed to be irremovable short of destroying the body.
Deadlocking action and two-point locking on each shackle ensures that each product can withstand a minimum force of 5.0kN.
Confusing key profile to deter attempts to sight-read the combination.
Additional Features
3 position shackle(s) to accommodate wide range of wrist sizes.
Three sizes off loose inserts (available as optional extras) to further reduce the opening for very small wrists. Reductions in normal diameter as follows:-
No. 1 - 19.0mm
No. 2 - 14.5mm
No.3 - 10.0mm
Smooth finish and absence of sharp corners (particularly around wrist holes) to ensure that handcuffs do not cause injuries, even after long periods of restraint.
Identification mark on key (‘0’ for 10 slider; ‘9’ for 9 slider) which should face towards grubscrew in base when entering key to ensure correct alignment.
NOTE: Key designed to enter one way round only.
Materials and Finishes
Shackle (castings), shackle ends and links - Mild steel
Swivel link - Malleable iron
All chrome plated on assembly
NOTE: 1K56 assemblies comprise just shackles and ends
Handcuff body - Diecast aluminium, anodised and spray painted matt black
Magazine caps - Mild steel, nickel plated
Magazine, sliders and keys - Brass
Locking balls - Phosphor bronze
Locking plunger - Mild steel, zinc plated and passivated
Loose insert - Diecast aluminium, spray painted matt black
Dimensions and weights
Body width - 77mm
Body height - 66mm
Body thickness - 28mm
Wrist hole sizes - 53 x 79mm (max extension), 53 x 63mm (mid), 53 x 57mm (min)
(Major and minor axis dimensions of approx eliptical shape formed)
47mm dia = No. 3 insert
47 x 43mm = No.2 insert
47 x 38mm = No. 1 insert
Weight (excluding keys):
1K52 = 625gms
1K56 = 285gms

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