Robust bit holder for secure and easy assembly and screwdriving work, extremely versatile PB 186 M: stainless steel magnetic bit holder for easy and fast bit changes for C 6.3 and E 6.3 (1/4″) PB 186 M: strong magnet locks PrecisionBits in position and holds screws in place PB 186: stainless steel bit holder with retaining ring, simple & fast bit change for C 6.3 (1/4″) Slim handle, compact and for universal applications High-quality materials used, oil/gasoline resistant Laser-marked serial number, lifetime guarantee