Using this wire stripper/cutter is easy. First, identify the wire gauge you're working with. For 8 - 18 AWG solid or 10 - 20 AWG stranded wires, choose the appropriate stripping hole and insert the wire. Then, gently squeeze the handles to strip the insulation. When you need to cut screws of 6 - 32 or 8 - 32 bolts, use the screw shearing holes. Just place the screw in the hole and squeeze hard. Remember, this tool is not insulated, so don't use it on live electrical wires. To maintain it, keep it clean after each use. You can wipe it with a dry cloth. If it gets dirty, you can use a mild cleaner. Store it in a dry place to prevent rust. And don't forget to check the lock regularly to make sure it's working properly.