TRX Tamper-proof Truss Machine Screw

[Material] Stainless steel
[Surface treatment] None, non-chrome black, trivalent chromate, non-chrome plating white, trivalent black, trivalent white, bright chromate plating, chromate plating, black chromate, nickel plating, chromate plating, trivalent stainless steel coating, CU copper plating German, brown plating, black paint with matte black head paint, black paint, temper color (dark).