HARFINGTON 5pcs H4 Hex Head Drill Bit Wrench 4mm Metric Flat Tip 1/4" Hex Shank 100mm (4") Long Magnetic Black Phosphate Hexagonal Screw Driver Socket Industrial Screwdriver Power Bits

The H value indicates the size of the hexagonal head. The larger the value, the larger the head, and the smaller the value, the smaller the head.Industrial grade hex flat tip screwdriver bit is made from specially heat-treated S2 steel for superior strength, hardness, and durability, with a black phosphate coating that forms a thin film to effectively block moisture and oxygen, reducing metal oxidation and corrosion while also providing a lubricating effect to enhance wear resistance.The hexagonal head of the screw driver is magnetized for easy use. Flat hex driver with magnetism can stably absorb the screw vertically or obliquely, making it easy to fix the screw, especially in a small space. Precision CNC machined hex head, precise appearance, reduces head wear during high-intensity tightening operations.Special torque buffer design, when the vibration generated during operation is absorbed by this part, the torque transmission is increased, achieving the effect of protecting the screwdriver head and extending the service life.Hex drill bit wrench specifically designed for driving screws into wood, metal, and other materials effortlessly. Can accurately tighten screws without damaging screws and hex bit socket. 1/4" drive hex shank bits can be used with electric screwdrivers, manual screwdrivers, electric drills, etc. for electricians, mechanical repair work, and furniture installation.Make sure the hex 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.

• Size - Metric flat hex head size: H4 (4mm); hex shank size: 1/4"; overall length: 100mm (4"); hardness: HRC59-61 (The recognized stable hardness is around HRC60.). The H value indicates the size of the hexagonal head. The larger the value, the larger the head, and the smaller the value, the smaller the head.
• Material - Industrial grade hex flat tip screwdriver bit is made from specially heat-treated S2 steel for superior strength, hardness, and durability, with a black phosphate coating that forms a thin film to effectively block moisture and oxygen, reducing metal oxidation and corrosion while also providing a lubricating effect to enhance wear resistance.
• Features - The hexagonal head of the screw driver is magnetized for easy use. Flat hex driver with magnetism can stably absorb the screw vertically or obliquely, making it easy to fix the screw, especially in a small space. Precision CNC machined hex head, precise appearance, reduces head wear during high-intensity tightening operations.
• Applications - Hex drill bit wrench specifically designed for driving screws into wood, metal, and other materials effortlessly. Can accurately tighten screws without damaging screws and hex bit socket. 1/4" drive hex shank bits can be used with electric screwdrivers, manual screwdrivers, electric drills, etc. for electricians, mechanical repair work, and furniture installation.
• Note - Make sure the hex 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.