Unisex Irish 8 Handcuffs Stainless Steel Gourd wrist restraints with Allen Screw Allen Key.Color: SilverMaterial: Stainless SteelPackage: BagLocking: Allen screwThickness: 0.8 cm/0.3 inchesFemale SizeDia: 4.3 * 5.8 cm/1.7" * 2.3"Male SizeDia: 5.3 * 6.3 cm/2.1" * 2.5"