Sportsheets Edge Leather Wrist Restraints features: Cowhide leather. Nickel free hardware. Handcrafted in the USA. Buckle closure. Adjusts from 9 inches to 14 inches. Removable metal tether. Includes: two leather wrist restraints and metal tether. Materials: Cowhide Leather, Nickel Plated Hardware, Nickel Free Hardware, Polyurethane Foam, Polyester Fabric. Wrist restraints come bulk without retail packaging.