Hexagonal Head Wrench Drill Bit 4mm (H4) Impact Hex Bits

Size - Metric hex head size: 4mm (H4), hex shank size: 1/4", overall length: 150mm / 6", hardness: HRC60-61 (The recognized stable hardness is around HRC60). Each hex bit is clearly engraved with the size number for easy identification.
Material - The magnetic screwdriver bits are made of heat-treated S2 steel, offering excellent strength, hardness, and durability. The surface is treated with black phosphate to improve its resistance to wear, corrosion, and rust, and it does not bend, break, or deform easily.
Features - The screwdriver's hex head is magnetic and easy to use. It can hold screws stably vertically or at an angle, making screw fastening easier, especially in tight spaces. The precision CNC-machined hexagonal head ensures close contact with the screw, making removal and installation more stable and less prone to slippage. Application - The magnetic hex bit can drive screws into wood, metal, and other materials effortlessly, and tighten screws precisely without damaging the screw or the hex socket. It is suitable for furniture assembly, mechanical equipment installation, automotive maintenance, DIY projects at home, furniture making, woodworking, etc. Note - 1/4-inch quick-release hex shank bits are widely used in pneumatic screwdrivers, hand drills, cordless drills, manual screwdriver handles, etc. Check that it is securely installed on the power tool before use. Keep it away from strong magnetic and high-temperature environments during storage to avoid affecting the magnetic effect.