Achieve flawless geometric accuracy and artistic precision with a technical instrument built for consistency. Whether you are drafting a complex architectural plan or teaching advanced geometry, the STAEDTLER Mars 551 provides the rigid stability and fine-tuned control required to produce perfect circles every single time.
Engineered for Creative Precision
Stop struggling with slipping adjustments or flimsy components. This heavy-duty metal compass is designed for educators and professionals who value tools that last. The integrated thumbwheel and quick-setting mechanism allow you to lock in your desired radius instantly, ensuring that your work remains accurate from the first arc to the final design.
Draw circles up to 500mm in diameter using the included extension bar, perfect for large-scale creative projects.
Hinged lead and needle legs ensure perpendicular positioning for clean, crisp lines without lead breakage.
Includes an adapter to easily swap between graphite lead, fineliners, and technical pens for diverse drafting needs.
Supplied in a durable hard-shell case with an integrated ruler to protect your precision instrument in any bag.
Why Precision Matters
In technical drawing, a fraction of a millimeter is the difference between success and failure. The STAEDTLER Mars 551 uses a center wheel mechanism that prevents accidental changes to your settings. This provides the "sober assurance" needed during long drafting sessions where consistency is paramount.
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Items can be returned or exchanged within 30 days of delivery.