3155H Steloy Hinge Style is made with top quality, heavy-duty, steel and Steloy construction. Steloy material makes the handcuff 40% lighter and 17% larger than standard cuffs and solid links connect the cuffs as opposed to the roller chain. Heavy-duty, solid hinges are for reinforced holding power and hinged models provide greater subject control. The18 tooth, 3-retaining-bar system provides uncompromising security and a positive swing-through action with built-in backloading for fast cuffing. Reinforced steel swivels for added strength and durability. Comes in nickel and black finish [order 3154H for nickel Finish].