Size - Magnetic ball end hex head size: H2 (2mm); hex shank size: 1/4 ; total length: 150mm / 6 ; hardness: HRC56-58 (The recognized stable hardness is around HRC60.). Each hex screwdriver bit is clearly engraved with the model number for easy identification. Material - The metric ball end hex screwdriver bit is made of specially heat-treated S2 steel with high strength and wear resistance, anti-bending, anti-breaking, not easy to deform, and durable. The chrome-plated surface is bright and shiny, effectively preventing metal oxidation and corrosion, and enhancing hardness and wear resistance for better scratch resistance. Features - Ball end hex bits are designed with magnetism. Magnetic screw driver tip can absorb the screws vertically or obliquely stably and fix the screws easily, and it is easy to install on the screwdriver handle. Especially in a small space, it can complete the work more conveniently and improve efficiency. Application - The metric screwdriver bit wrench is a good helper for removing or installing screws, and is used in such as furniture assembly, mechanical equipment installation, car repair, home DIY projects, homemade furniture, building woodworking structures, etc. Widely used in manual electric screwdrivers, drills, and electric drills. Note - Check whether the ball end drill bit is firmly installed on the power tool before use. Keep it away from high magnetic and high-temperature environments when storing it to avoid affecting the magnetic effect. Brand Name HARFINGTON Unit Count 1.0 Count Manufacturer HARFINGTON Model Number 1 Manufacturer Part Number hta250325hh001678