20pcs Hex Key Bit Set 100mm | S2 Steel Magnetic Allen Driver Bits for Drill ImpactUpgrade your toolkit with this 20 piece hex key bit set, designed for precision, durability, and convenience. Made from high quality S2 steel, these bits are heat treated for superior strength, wear resistance, and long lasting performance. Each bit features a 1 4" (6. 35mm) hex shank, making them compatible with most power drills, impact drivers, and quick change chucks. The extended 100mm length allows easier access to deep or hard to reach areas,