Using the Makita A - 96643 ImpactX #1 Phillips 2 Power Bit is easy. First, make sure your high - torque impact driver or driver - drill is turned off. Then, insert the bit into the driver's chuck and tighten it properly. You can use these bits for a variety of heavy - duty jobs such as metal fastening, deck building, and framing. Just place the bit on the screw head and start the driver. When you're done using the bits, clean them with a dry cloth to remove any debris. Store them in a dry place to prevent corrosion. Be careful not to use these bits with drivers that exceed their recommended torque, as this can damage the bits. Also, if you notice any signs of wear or damage, it's time to replace the bits.