Made of heat-treated chromium-vanadium steel, high hardness, good impact resistance and wear resistance, can increase torque and stability, and reduce deformation. Polished chrome-plated surface is smooth, extending the tool's lifespan. Suitable for installation in various hex tools, such as pneumatic screwdrivers, electric screwdrivers, pneumatic drills, electric drills, pistol grip drills, manual screwdrivers, etc. Widely used in home DIY, auto parts, woodworking, professional machinery repair, and other scenarios. The socket is widely used for removing and tightening bolts and nuts of various structural fasteners., Manufacturer: LOPAKACTAG