7 Pcs, Spline Drill Screwdriver Bits, Triple Square XZN Bits,M4-M12

The spline XZN screwdriver hex shank drill bits are made of S2 high quality steel. Includes seven sizes M4, M5, M6, M7, M8, M10, and M12, meeting a wide range of repair and assembly needs. The 1/4 inch quick-change magnetic shank allows secure attachment to power tools, screwdrivers, and drills.