
The Karl Dahm Master Compass is a highly functional precision tool specifically designed to meet the needs of tilers and craftsmen. With a maximum radius of 55 cm — extendable at will — it combines compass and circle cutter in one, guaranteeing utmost accuracy when marking and cutting round shapes on tiles, glass, and other smooth surfaces.
The Master Compass features an interchangeable blade 28 cm wide (without handle). This allows precise and clean marking of measurement lines or drill points on various surfaces — ideal for creating sophisticated designs and high-quality tiling work.
Thanks to its flexible design, you can quickly convert the compass into a circle cutter as needed. This multifunctional tool offers maximum precision both for marking and cutting.
The Master Compass comes complete with:
Mechanical pencil for precise marking
Cutting rail for straight, clean cuts
Suction cup ensuring firm grip on smooth surfaces
Ball joint pin for stable fixation
Cutting head holder, suitable for glass cutter or pencil
The detachable extensions (25 cm) allow you to increase the radius beyond the standard 55 cm — enabling easy handling of large-format projects.
Item No. 12 352 – Master Compass 55 cm: Compass with circle cutter function, radius 55 cm, extendable at will
Item No. 12 353 – Extension 25 cm: Detachable radius extension for the Master Compass
Item No. 10 148 – Oil Glass Cutter: High-quality glass cutter for precise cuts
Item No. 12 046 – Mechanical Pencil (refillable): For exact marking on various surfaces
Item No. 12 047 – Replacement Leads for Mechanical Pencil: Refills for the pencil
Item No. 11 353 – Replacement Leads for Master Compass 12 352: Spare leads for the Master Compass
Item No. 11 371 – Suction Cup: Replacement suction cup for the Master Compass, ensures secure hold

The Master Compass is an indispensable tool for tilers, glass workers, and craftsmen who require precise curves, clean markings, and accurate cuts. Its versatility, extendable radius, and well-thought-out accessories make it the perfect helper for demanding tiling projects.
Combining durable materials, innovative suction cup technology, and ergonomic design, the Master Compass not only ensures precise work but also saves time and reduces material waste.
Rely on Karl Dahm’s quality and expertise — order your Master Compass conveniently online today.
What is the Master Compass and what is it used for?
The Master Compass is a multifunctional tool designed specifically for precise circular cuts and exact marking of circles and measurement lines. It is mainly used by tilers, glass workers, and craftsmen to mark round shapes on tiles, glass, or other materials with millimetre precision and to cut them directly if needed. Its ability to convert into a circle cutter makes it particularly versatile for design and installation work.
How does the suction cup technology of the Master Compass work?
The integrated suction cup ensures that the compass adheres firmly and securely to very smooth surfaces such as tiles or glass. This effectively prevents slipping during marking or cutting, guaranteeing a clean line and maximum precision at every step.
How can the radius of the Master Compass be extended?
The standard radius of the Master Compass is 55 cm. Thanks to optional detachable extensions, the radius can be flexibly extended by 25 cm increments. This allows working on larger areas or creating bigger circles and designs.
What are the advantages of the integrated circle cutter?
The circle cutter is built directly into the Master Compass and can be quickly and easily activated when needed. This allows you to set precise markings and immediately cut round openings without having to change tools. This saves time and increases efficiency.
Which spare parts and accessories are available?
Karl Dahm offers a wide range of spare parts for the Master Compass, including replacement leads for the mechanical pencil, spare leads for the compass, and replacement suction cups. Additionally, extensions for increasing the radius and a high-quality oil glass cutter are available for precise glass cutting.
How is the Master Compass used correctly?
First, set the desired radius with or without an extension. Then fix the suction cup onto the smooth surface to be worked on. Next, mark the desired circle using the mechanical pencil or the integrated cutting head. For openings, activate the circle cutter and cut precisely.
Which materials can be processed with the Master Compass?
The Master Compass is ideal for tiles, glass, mirrors, and other smooth surfaces. It is particularly suitable for materials where precise curves are necessary and tool slippage must be avoided.
How durable is the Master Compass?
The Master Compass is made from robust and durable materials designed to withstand intensive use on site. By purchasing replacement parts such as leads or suction cups, the tool’s lifespan can be further extended.
Can the Master Compass be used for other applications?
Yes, beyond tiling, the Master Compass is a valuable tool for creative design projects, general crafts, and glass processing. Its precise guidance and ability to mark measurement lines and drill points make it very versatile.
Why should I buy the Master Compass from Karl Dahm?
Karl Dahm has stood for quality, expertise, and reliable service in the trades sector for decades. The Master Compass is tailored specifically to the needs of tilers and craftsmen. You benefit from expert advice, high-quality products, and a comprehensive range of accessories — all from a single source.