Fastcap TIPMAG ProCarpenter Extreme Magnetism Tip Magnet Tool With the perfect combination of polarity, strength and shape the Tip Mag is the most powerful magnet you will ever use. Regardless of where you position the Tip Mag (close to the screw or at the base of the screw gun), the magnetic transfer is amazing. The Tip Mag also works great on screwdrivers and 6-Inch long extension bits.