Using this Klein screwdriver set is easy. First, choose the right tip (#1 or #2) according to the size of the combination head screw on your electrical device. Hold the screwdriver by the cushion - grip handle for a comfortable and firm hold. Then, insert the tip into the screw head and turn it clockwise to tighten or counter - clockwise to loosen. When using, make sure the tip fits snugly into the screw head to avoid slipping and damaging the screw or the device. As for maintenance, after each use, wipe the screwdriver clean with a dry cloth. Store it in a dry place to prevent rusting. With proper use and maintenance, this screwdriver set will serve you well for a long time.