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Push through the fixing hole, get a bright green chalk mark exactly where you need to drill. No fussing about with pencils or tape. Works on most surfaces, marks up to 100mm deep, and leaves a clean dot that wipes off when you’re done.
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.
Pro Tip: When marking through a deep fitting hole, hold the Marxman fully vertical and apply one firm, deliberate press rather than a series of light taps — a single clean burst gives a tighter, more accurate dot than repeated half-presses.
The Marxman is used wherever a fixing point needs to be transferred accurately through a hole in a fitting or bracket. Kitchen fitters use them when hanging wall cabinets, electricians reach for them when positioning back boxes and consumer units, and plumbers use them for radiator brackets and pipe clips. General builders and joiners find them just as useful for door furniture, shelving brackets, and any structural fixing where the hole position is hidden inside the fixture itself.
Best For
Marking drill points through fixing holes
Kitchen and bedroom fitting installation
Electrical back box and consumer unit positioning
Radiator and plumbing bracket fixing
Any fixture or fitting with a pre-drilled hole
Available In
Standard version: marks up to 50mm depth
Deep Hole version: marks up to 100mm depth
Bright green chalk marker
Box of 30 mixed pens
Key Features
Approximately 250 bursts per pen
Bright green chalk for clear visibility
Easy to remove from most surfaces
UK designed and manufactured
Patented single-push mechanism
Compact enough to carry in a tool belt
Not suitable for: Not suitable for marking through holes narrower than the pen tip diameter. The chalk mark is temporary and may not show clearly on very dark or heavily textured surfaces.
No preparation needed. Select the correct pen for the depth of your fixing hole, offer the fitting up to the wall in its final position, insert the Marxman tip into the hole, and press firmly once. Remove the fitting and you will see a green chalk dot on the surface. Drill on that mark.
The chalk brushes or wipes away cleanly after drilling, so there is no need to worry about marks left on finished surfaces. If you are working on a particularly absorbent or rough surface, check the mark is clear before removing the fitting, and give a second press if needed.
Select the Standard pen for fixing depths up to 50mm, or the Deep Hole pen for depths up to 100mm
Hold the fitting or bracket in its final position against the surface
Insert the Marxman tip fully into the fixing hole
Apply one firm, single press to release a burst of chalk
Remove the fitting carefully without shifting its position
Check the green chalk mark is clearly visible on the surface
Drill on the mark, then wipe away any remaining chalk residue
What is the difference between the Standard and Deep Hole Marxman pens?
The Standard pen marks fixing points at depths up to 50mm, which suits most everyday brackets, hinges, and fittings. The Deep Hole version reaches down to 100mm, which is useful for thicker fixtures, deep socket recesses, or any situation where the fixing hole is set well back from the face of the fitting.
Will the green chalk mark damage or stain the surface?
The chalk is designed to be easy to remove and wipes away cleanly from most surfaces without staining. It is suitable for use on plaster, tile, brick, timber, and most painted surfaces, though it is always worth testing on an inconspicuous area if you are working on something particularly delicate or porous.
How many marks does each pen give before it runs out?
Each Marxman pen gives approximately 250 bursts of chalk. That is enough to keep most tradespeople going across a full installation job. A box of 30 pens is well suited to ongoing site use or keeping multiple operatives stocked up.
The Marxman uses a patented spring-loaded mechanism to deliver a controlled burst of bright green chalk powder through a narrow nozzle. The chalk formulation is designed for visibility across a wide range of surfaces and for easy removal without leaving permanent residue. The pen body is compact and constructed to handle regular site use without the mechanism clogging or misfiring under normal conditions.
Pack Contents
Box of 30 pens (Standard and Deep Hole types)
Standard Depth Range
Up to 50mm
Deep Hole Depth Range
Up to 100mm
Chalk Colour
Bright green
Approximate Bursts Per Pen
250
Origin
UK designed and manufactured
SKU
MXM025970
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