The Smith & Wesson model 1800 restraint chains. High security belly chain. Heat-treated and welded; comes standard with Model 100 satin nickel handcuffs. MEETS NIJ STANDARD 0307.01 Specifications: Cuff distance from chain: 3.5 Distance between cuffs: 15.25 Overall chain length: 54 Waist size adjusts to 5 positions Weight: 27 ounces Two Keys Included