for work under voltage 1000V, with the help of the adjusting screw the cutting depth of 0.5 – 5 mm insulation thickness can be adjusted. At the beginning of each longitudinal or round cut, the knife is guided by gently pressing the finger on the tab, the outer insulation is cut by small lever movements (> 90 °) and the teeth are pressed against the insulation at the same time. The knife can always be turned between the longitudinal and the round cut, during the stripping process “intermediate piece” the tip of the blade must be slightly pressed into the outer insulation.