Make of steel, it has high hardness and wear resistance, suitable for heavy-duty operations The unique concave hexagonal designs makes the nut easier to insert and improves work efficiency Built in steel ball design effectively prevents sliding and ensures tight engagement during screw operate, making it easy to complete tasks Suitable for parts installation, automotive repair, engineering repair, and mechanical maintenance, widely used in multiple fields 6.35mm universals hexagonal handle is suitable for various products such as charging drills, handheld drills, and hexagonal nut, with a wide ranges of adaptability, Manufacturer: KHZen