Using the DeWalt DW2067 7 - piece torx bit set is easy. First, select the right bit size for your torx screw. Simply insert the bit into your screwdriver or drill. When you're driving the screw, apply steady pressure and use a smooth motion. This will help prevent the bit from slipping out and damaging the screw. As for maintenance, after each use, wipe the bits clean with a dry cloth to remove any dust or debris. Store the bits in a dry place to avoid rusting. If you notice any signs of wear or damage, it might be time to replace the bit. Also, always make sure your drill or screwdriver is in good working condition to get the best performance from the bits.