MARXMATE Fluro Green Chalk Deep Hole Marker 

MarXmate is a unique tool designed so that with one push it quickly, easily and clearly marks almost any surface.

The perfect drilling companion for electrical, plumbing, building jobs and much more.

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.