Using the Klein 32800 6-in-1 multi-bit screwdriver and nut driver is super easy. First, figure out which size nut driver you need for your job. The color - coded shaft ends make this quick and simple. Just pick the right size, attach it to the driver, and you're ready to work. When you're done with one size, switch it out for another easily. As for maintenance, after each use, wipe the tool clean with a dry cloth to keep it in good condition. Store it in a dry place to prevent rusting. Also, be careful not to use excessive force that could damage the tool or the nuts. With proper use and care, this tool will serve you well for a long time.