The screwdriver bits are made of specially heat-treated S2 steel with high strength and hardness up to HRC58-62(The recognized stable hardness is around HRC60), durable and anti-bending, and the surface is black phosphating for enhanced grip and corrosion resistance for industrial use.The hex bits are designed with strong magnetism, which can stably absorb the screws vertically or tilted and easily fix the screws, especially in a small space, which can make it more convenient to complete the work.The hex drill bit specifically designed for driving screws into wood, metal, and other materials effortlessly. Can accurately tighten screws without damaging screws and screwdriver bits.1/4" hex shank driver bits can be used with electric screwdrivers, manual screwdrivers, electric drills, etc.
eBay