Over the years, the original Model 100 series Smith and Wesson handcuffs have become a standard piece of police equipment for many law enforcement agencies. These Smith and Wesson handcuffs are made with heat treated internal lockworks, featuring smooth ratchets for swift cuffing and double locks to prevent tampering. Smith and Wesson handcuffs meet or exceed demanding US National Institute of Justice tests for workmanship, strength, corrosion and tamper resistance.