Handcuffs with double locks have a lock-spring which when engaged stops the cuff from ratcheting tighter to prevent the wearer from tightening them. Tightening could be intentional or by struggling; if tightened, the handcuffs may cause nerve damage or loss of circulation. Also some wearers could tighten the cuffs to attempt an escape by having the officer loosen the cuffs and attempting to escape while the cuffs are loose. Double locks also make picking the locks more difficult.
There exist three kinds of double locks as described in a Smith & Wesson brochure:
Other articles related to "locks, double locks, lock, double, double lock":
... Locks can be built side by side on the same waterway ... The Panama Canal has three sets of double locks ... times and increasing the chance of a boat finding a lock set in its favour ...
... These are double-locked by inserting the small peg on the top of the key into the double lock slot ... In this position, the small peg can contact the end of the lock spring ... This causes the lock spring to move into a position that locks the bolt, thus preventing the cuff from being further tightened ...
... The Double Locks (雙鎖功, Shuāng suǒ gōng) allows the practitioner to block attacks from blunt weapons with his bare arms ...
Famous quotes containing the words locks and/or double:
“Nodding, its great head rattling like a gourd,
And locks like seaweed strung on the stinking stone,
The nightmare stumbles past,”
—Robert Penn Warren (19051989)
“Was it the double of my dream
The woman that by me lay
Dreamed, or did we halve a dream
Under the first cold gleam of day?”
—William Butler Yeats (18651939)