Uxcell 3pcs Hex Head Wrench Drill Bit 4mm(H4) Metric 1/4" Hex Shank 4"(100mm) Length S3 Steel Magnetic Impact Drivers Screwdriver Bit Industrial Grade Hexagon Electric Drill Bits

The screwdriver bits are made of specially heat-treated S3 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. for electricians, mechanical repair work, and furniture installation. Make sure the screwdriver bit is firmly inserted into the power tool chuck before operation. Avoid using excessive force when tightening the screws to prevent the bit from being damaged or slipping out. Store the screwdriver bit in a dry place to prevent rust and maintain its performance.