Made Of high quality 4.8 Grade Carbon Steel. Good elasticity, high hardness, good wear resistance, smooth surface and no burr.Sturdy and durable. Corrosion Resistance and Anti-rust With Zinc coated .Suitable for indoor and outdoor use and humid environment. Adopt hairpin design, can fast, safe and effective lock bolt, prevent relative rotation, durable. Suitable for use with Tractors, Farm Equipment, Trucks, Cars, Campers, Lawn and Garden Equipment, etc. Model: M5x100. Package Included:2 PCS., Manufacturer: LQ Industrial