These Knipex Automatic Wire Strippers are a versatile tool that can effortlessly strip cables ranging from .8-16mm in diameter. Made with high-quality materials such as plastic, metal and steel, this cable stripper is built to last.nnI have owned these for little over a year with very light use, mainly hookup wire of finer gauges. Action is still very smooth and precise. No major marks or scratches as seen in pictures.