Peerless Model 700c Chain Link Handcuffs feature a classic linked handcuff design and are made in the U.S.A. The handcuffs use a standard key (2 keys are included), improved double locking system, and are stamped with serial and model number. This model meets NIJ standard 0307.01, all peerless handcuffs are backed by a lifetime guarantee for manufacture defects. Cuff Details: wrist opening: 2", first notch inside perimeter: 8.3", last notch inside perimeter: 5.9", minimum inside width (last tooth): 1.9", maximum inside width(first tooth): 3", distance between cuffs: 2", maximum overall length: 8.9"