1. [Type]: self-tapping screw. Head style: Countersunk Cross Screw Head^2. [Heavy Duty Material]: These hex nuts are made of nickel plated carbon steel, it provides strength and good corrosion resistance in many environments.^3. [Wide Application]: These screws are suitable for door handles, machinery industry and other small repairs around the workshop, garage fasteners or home furniture, etc.^4.[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.^5.[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.^