Magnetic Bit Storage System. Suitable for all electrical screwdrivers. Mounting screw included for: Festool, Makita, Bosch, Hitachi/Hikoki, DeWalt & Milwaukee M18. If you want to fit Bitmag on M12 you will need a M2,5 x 0,45 x 20mm screw and some washers for distance. You can also attach your BITMAG using doubled-sided foam tape. That is especially suitable for smaller screwdrivers without clip-holes and also for brands like Hilti that has a unique clip attachment.