Standard & Deep Hole Marxman – Box of 30 – 13ml

The Marxman deep hole marker is one of those tools that once you’ve used it, you wonder how you managed without it. Push the pen into a fixture or fitting hole, give it one firm press, and a burst of bright green chalk fires onto the surface beneath — leaving a precise, visible dot exactly where your drill needs to go. No more guessing, no more pencil marks that disappear, no more holding a fitting in place with one hand while fumbling for a marker with the other.

This box contains both Standard and Deep Hole versions. The Standard Marxman marks fixing depths up to 50mm, which covers the vast majority of everyday bracket and fitting work. The Deep Hole version reaches down to 100mm, handling thicker fixtures, deeper socket recesses, and situations where the fixing point is well below the surface. Each pen gives approximately 250 bursts of chalk, so a box of 30 goes a long way on a busy site or across a regular installation schedule.

Where the Marxman Deep Hole Marker Earns Its Keep

Electricians, plumbers, kitchen fitters, and general builders all find a use for these. Hanging radiators, fixing back boxes, mounting consumer units, installing kitchen cabinets — anything that involves offering up a fitting and marking through a pre-drilled hole benefits from a Marxman. The bright green chalk is easy to spot on most surfaces, and it cleans off without leaving a permanent mark, which matters when you’re working on finished walls or light-coloured surfaces.

Designed and manufactured in the UK, and yes, it did appear on Dragon’s Den, which is either a fun bit of trivia or proof that a genuinely good idea finds its audience eventually. Either way, the tool earned its place on site on its own merits. The chalk wipes away cleanly, the mechanism is simple and reliable, and the pen is compact enough to keep in a tool belt or apron pocket without any bother.