ASP 56103 - black Tactical Lightweight Chain Handcuffs (Aluminum) Tested for durability All black construction with aluminum chain. Interlocking, unitized frame. The cuff Structure is forged from high strength stainless steel Made using the highest quality materials Flat contact surface with fully radiused edges, serial numbered Recessed keyway on each side of cuff with yellow Flat Contact Surface with fully Radiused Edges, Serial Numbered Recessed Keyway on Each Side of Cuff with Yellow Indicator Double Lock Alert Replaceable Lock Sets Hand Welded Stainless Chain Weight: 7 oz