Note: Only the bottom of the hole part is magnetic, the hexagonal shank is NOT magnetic! Only for single head hex drill bits. Interface has locking mechanism, built-in magnetic, automatically pop-up batch head. 6.35mm hex shank to extend all kinds of screwdriver bits, drill, batch head, screwdriver head conversion uses. Magnetic built-in (only the bottom part of the hole part), the quick quick release will allow you to 39;greatly improve work efficiency. 1/4’’ (6.35mm) Hex Shank, Length: 60mm/100mm/150mm Perfect for drill, screwdriver, metering head and other to transfer.