Using this Klein Combo - Tip Screwdriver is easy. Just select the right tip for the combination head screw you're working with and apply pressure while turning. When using, make sure you're using the right amount of force to avoid stripping the screw. As for maintenance, after each use, wipe the screwdriver clean with a dry cloth to keep it in good condition. Store it in a dry place to prevent rusting. This screwdriver isn't insulated, so don't use it on live electrical circuits to stay safe.