Package content :a box of metal plate screws [Type] self-tapping screw. Head style Countersunk Cross Screw Head [Heavy Duty Material] These hex nuts are made of nickel plated carbon steel, it provides strength and good corrosion resistance in many environments. [Wide Application] These screws are suitable for door handles, machinery industry and other small repairs around the workshop, garage fasteners or home furniture, etc. [Material] The screw is carbon steel, and the surface is black. It has strong anti-rust and anti-corrosion properties even in humid environment, and is beautiful and practical. [Sharp Wire] Smooth wire surface, clear wires, no burrs. When mounted on dowels, wood to wood, ceilings, etc., it has good fixing properties and does not slip easily during installation.