Using the Makita A - 99502 ImpactX Magnetic Nut Driver is easy. First, make sure your high - torque impact driver or driver - drill is turned off. Then, insert the nut driver into the tool's chuck. Once it's securely in place, you can start using it to drive hex head nuts or self - tapping screws. For the best results, keep the driver perpendicular to the fastener when you're driving. When it comes to maintenance, after each use, wipe the nut driver clean with a dry cloth. This will help keep the manganese phosphate surface in good condition and prevent corrosion. Also, store it in a dry place. Avoid using it with excessive force that's beyond its capacity, as this could damage the bit. With proper use and care, this nut driver will serve you well for a long time.