Using this Jokari cable stripper is a breeze. First, make sure the tool is locked properly before use. To strip a cable, simply place the cable into the appropriate opening in the stripper. The soft - padded grips will give you a firm hold, so you can work with confidence. You don't need to worry about adjusting the cutting depth as the tool is designed to handle different wire sizes from 0.2 to 4.0 mm². Just apply a bit of pressure and make a longitudinal cut. The innovative design will prevent cable waste from getting stuck. When you're done, you can use the integrated, multi - function, slide - out blade for other small tasks. For maintenance, keep the tool clean and dry. Avoid exposing it to extreme temperatures. If the blades seem to be getting dull over time, you can consider having them sharpened or replaced. This tool is TÜV / GS approved, so you can trust its quality for long - term use.