Pica-Ink Deep Hole Marker Execution: Self-aligning stainless steel telescopic tip, up to 3 times more efficiency thanks to movable and self-aligning telescopic tip, full use of the working tip dimension of 7 mm instead of 2 mm. It extends the life of the product up to 7 times thanks to the movable telescopic tip. The fibrous core can be reversed 180°, the marker for deep holes regenerates automatically after a few minutes. Practical carrying case with special clip for one-handed operation. Permanent ink can be removed with alcohol or spirit. Use: For marking drilling holes and for working in hard-to-reach places. He writes on all dry surfaces.