HIGH GRADE STEEL - Made From heat treated steel material in a beautiful finish, which is wear resistance anti-impact, tough and to use long time. ULTIMATE DURABILITY - The PH2 screwdriver drill bits have high concentricity, effectively reducing the bit swinging. Great replacement for missing, bent or broken screwdriver bits. ANTI- SLIP - Magnetic Tips and anti-slip fine tooth design ensures that each edge accurately locks screws in place, resulting in less stripped screws and a more efficient work process. UNIVERSAL COMPATIBILITY - The universal 1/4inch(6.35mm) hex shank with power groove fits most hand screwdrivers, electric screwdrivers, and electric drills, making it a highly compatible addition to your tool collection., Weight: 0.24471311082 pounds, Manufacturer: Hipzeepo