Using this Makita screw bit set is easy. First, pick the right - sized screw bit for your job. Attach it to the magnetic bit holder, and you're ready to start screwing. When using, make sure the drill or driver is set to the appropriate speed and torque to avoid damaging the bits. After each use, clean the bits with a dry cloth to remove any debris. Store the set back in the plastic case in a dry place to prevent rusting. Don't use the bits on materials that are too hard for them, as this could cause the bits to break or wear out quickly.