Ink. Felt tip pen for marking in narrow and deep holes. Telescopic tip in stainless steel with a diam. 1.5 mm so it easily fits through brackets, e.g. for screw holes. The pen body is made completely of plastic, which means that it does not conduct a current. For permanent marking on all dry surfaces/materials. The cap is fitted with a belt clip for easy storage on trousers or tool pouch. The ink can be removed with alcohol or similar if necessary. If the pen "dries out" – replace the cap and leave for a few days and it will restore itself. If the tip becomes blunt, cut off the final millimetre and the tip will be just like new again. This can be done several times as the tip is telescopic and can be pushed back and forth. You can also remove the entire ink stick and rotate it 180 ° so the tip is like new again.