The BITMAG Composite is made from high-quality fiberglass reinforced composite polymer with strong Samarium-Cobalt magnets. 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 or construction adhesive. Thats especially suitable for models without clips and also for brands like Hilti that has a unique clip attachment. Just make sure to clean the surface on your power tool before attaching.