Using this Jokari cable stripper is a breeze. First, select the appropriate cable size within the 8 - 15 mm (5/16“ - 19/32“) range. Place the cable in the stripper and close it gently. Since there's no need to adjust the cutting depth, you can start stripping right away. For left - handed users, just change the length stop to your preferred side. When using the additional stripping device for 1.5² and 2.5² wires, simply follow the same process. As for maintenance, keep the tool clean after each use. You can use a dry cloth to wipe off any debris. Avoid exposing it to excessive moisture or extreme temperatures. And always store it in a safe place when not in use. Make sure to handle the tool with care to keep it in good working condition.