Knipex 00 11 17 pen style control cabinet key with voltage detector knipex 00 11 17 p this pen style control cabinet key from knipex has a voltage detector and is ideal for switchgear cabinets shut off systems the gas water and electricity supply for technical plants in buildings such as climatic and ventilating systems stop valves net instrument panels etc br p p features of the key include interior square 6 8mm indoor triangular saw blade 9mm universal 6 3mm 1 4in bit holde