Model 100 (Melonite®) Handcuffs Model 100 Slot lock Melonite handcuff with wrist opening of 2.04 inch, weight 10.0 oz and distance between the cuffs is 2.00 inch. Meet NIJ standard 0307.01. Smith and Wesson handcuffs have become a standard piece of police equipment for many law enforcement agencies. Smith and Wesson supply the finest profesional quality handcuffs to police worldwide. These Smith and Wesson Melonite handcuffs are made with heat treated internal lockworks, featuring smooth ratchets for swift cuffing and double locks to prevent tampering (teeth in opposing directions as well as key). Smith and Wesson handcuffs meet or exceed demanding US National Institute of Justice tests for workmanship, strength, corrosion and tamper resistance. From the original Model 100 series handcuffs to the invariable durability of their restraint chains and leg cuffs - Smith and Wesson handcuffs are a proven worldwide leader in handcuff and restraint production. Melonite™ is a treatment for improving the surface properties of metal parts. The result is an ultra-durable, matte-black, scratch-resistant surface. Two handcuff keys included Exceeds National Institute of Justice tests Double lock Corrosion and tamper resistance