Fast back loading allows open cuff to be snapped back into place and reapplied without releasing offender's hand 18-tooth, 3-retaining bar system provides increased strength Swing arm is balanced and centered to lock into center of shackle every time Top quality, heavy duty, steel construction Added power and control that can only come from a solid bar rigid design 18 tooth, 3-retaining-bar system for uncompromising security Positive swing-through action Built-in backloading for fast cuffing Reinforced steel swivels for added strength and durability The 2103H/2105 Rigid Handcuffs are made with top quality, heavy-duty, steel construction and offer added power and control that can only come from a solid bar rigid design. Designed for law enforcement, 18 tooth, 3-retaining-bar system offers uncompromising security and a positive swing-through action. Built-in backloading provides fast cuffing, and the reinforced steel swivels add strength and durability. increased strength as the shackle engages the additional teeth.