Model 1 Hinged-Linked Universal HandcuffsIdeal for Both Larger and Smaller Prisoners Push Pin Double Locking System Two Keys Included Available in Nickel Finish The Smith & Wesson hinged universal handcuffs are ideal for both larger and smaller prisoners. The contoured shape of the swinging arm allows these handcuffs to open 25% wider and also close 25% smaller than standard Smith & Wesson handcuffs. Hinged handcuffs are used in applications where subject movement needs further restriction.