Top quality, heavy duty, steel construction 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 Nickel Model 2010-H Certified Under NIJ Standard 0307.01 Standard Chain Style is constructed with top-quality, heavy-duty steel construction featuring an 18-tooth, 3-retaining-bar system for uncompromising security and a positive swing-through action.