Using the Makita A - 99116 ImpactX #2 Phillips 3 - 1/2 Power Bits is a breeze. First, select the right bit for your task. These bits are perfect for use with high - torque impact drivers and driver - drills. Just insert the bit into your tool's chuck and tighten it properly. You can then start driving screws in heavy - duty applications like metal fastening, deck building, or framing. When using the bits, make sure your work surface is stable. Avoid using excessive force as the bits are engineered to handle high - torque situations, but it's still better to use a steady hand. After each use, wipe the bits clean to remove any debris. Store them in a dry place to prevent rust. Thanks to the Manganese Phosphate surface, they have good corrosion resistance, but keeping them dry will extend their life even more. And remember, these bits are designed for professional use, so they'll last you a long time if you take proper care of them.