MarXman is a unique tool designed so that with one push it quickly, easily and clearly marks almost any surface. The Marxman hole marking tool is the perfect tool for any toolbox, whether you use it on regular projects or a few times a year, it is always handy to have it nearby. The perfect drilling companion for electrical, plumbing, building jobs and much more. The Marxman allows you to mark screw holes with the push of a pen. Each pen contains 250+ bursts of removable fluorescent green pigment, and is capable of marking all surfaces including brick, metal, wood, pebbledash, porcelain and ceramic. How Does it Work? Simple, shake the pen. Push the nozzle into the fixing hole and then push the pen. If you're marking the hole onto a ceiling, then point it into downwards position first and then towards the ceiling. Set contains x1 Deep hole marker specifically designed for holes over 45mm deep. x1 Standard depth hole marker designed for holes up to 45mm deep.