1Efficient Work: Tight fixing, easy disassembly, accurately forged blade, tightly engaged with screws, stable and not easy to slip, making the operation more efficient. 2Good S2 Material: The waterproof material is durable and durable, with two specifications and two types, corrosion prevention, rust prevention, and durability. 3Great Stability: High accuracy concentric shaft, straight and concentric, not easy to shake, not easy to slip and wear, more durable, with high concentricity and not easy to wear. 4Magnetic Design: The overall magnetization treatment and the overall magnetization treatment of the bit can firmly fix the screws during use, improving work efficiency. 5With Hex Shank: Clamping firmly and anti slip, hex joint, sturdy and durable, with a long service life. It is universal for lithium electric drills and hand electric drills, etc. 9 xPower Nut Driver Drill Bit 1 x Bit Extension Rod