This Marxman Professional Drill Hole Marking Tool is an easy-to-use marking pen that creates a clear and precise mark of removable fluorescent green pigment, all with just one push. The pigment will work on almost any surface, including wood, metal, brick, ceramic and more, making it simple for you to see where exactly to drill. With 250+ uses per pen, this Marxman Drill Hole Marking Tool is a toolbox essential for any tradesperson and is suitable for marking 50-100mm hole depths.