--- product_id: 263716582 title: "Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry" brand: "mr. pen" price: "€ 30.30" currency: EUR in_stock: true reviews_count: 5 category: "Mr. Pen" url: https://www.desertcart.pt/products/263716582-mr-pen-professional-compass-with-lock-up-to-18-inch store_origin: PT region: Portugal --- # Up to 18-inch diameter precision Push-button quick leg adjustment Includes screwdriver & spare parts Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry **Brand:** mr. pen **Price:** € 30.30 **Availability:** ✅ In Stock ## Summary > 🎯 Master precision, own the circle. ## Quick Answers - **What is this?** Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry by mr. pen - **How much does it cost?** € 30.30 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/263716582-mr-pen-professional-compass-with-lock-up-to-18-inch) ## Best For - mr. pen enthusiasts ## Why This Product - Trusted mr. pen brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Lock It Down:** Spring bow head and thumbwheel lock prevent slip-ups and keep your lines flawless. - • **Universal Fit:** Compatible with pencils, pens, and mechanical pencils—versatility that matches your style. - • **Sleek & Durable:** Premium metal build with a reusable pouch—carry your precision tool like a pro. - • **Ready for Anything:** Comes with 10 extra leads, spare needle, screws, and a handy screwdriver—always be prepared. - • **Draw Big, Draw Bold:** Create perfect circles up to 18 inches with ease—stand out in every project. ## Overview The Mr. Pen Professional Compass is a durable metal drafting tool designed for precision geometry and art, capable of drawing circles up to 18 inches in diameter. Featuring a spring bow head with a push-button mechanism to prevent unintended leg movement, it offers quick and accurate adjustments. The compass includes a universal adapter for various writing instruments, an extension beam for larger circles, and comes with extra leads, needles, screws, and a screwdriver, all packed in a reusable pouch for easy storage and transport. ## Description 1 Precision Compass:Draws Circles Up To 18 Inches In DiameterMade From Metal, Durable For LifeSpring Bow Head And Thumbwheel To Prevent Unintended Movement In The LegsPush Button Mechanism For Quick Leg AdjustmentInterchangeable Leads And NeedlesUniversal Adapter:Fits Pencils, Pens, Mechanical Pencils EvenExtension Beam:Easy To Draw Big Circles Up To 18 Inches Using The Beam10 Extra LeadExtra Needle And ScrewsMetal Screw DriverTo Loosen And Tighten The Screws In The Compass Easily To Your Preferred Setting Review: Great features, solid and awesome customer service - Update: I contacted the seller and his response was super fast and sorted out the problem right away. We now have a compass that works well and that one must have been a one off one that has a problem. My son loves it and the feature where you push both bottoms to expand it quickly is super useful when he is doing his geometry homework. That way, he doesn’t have waste time using the small dial to expand the leg or reduce the size. ————- (Old review) I was excited to get this for my son for his Geometry class. So was he. All are great such as refills, extra screws, the little metal plate as a screw driver to tighten the screw for the leg that bends, additional leg to draw a big circle (although this isn't necessary for his class), but one slight oversight which is annoying to use is the screw that tightens the legs from bending. The screw head is so shallow, I cannot tighten it before threading the screw. Needless to say that I cannot tighten it. So, when my son uses it, it kept bending when he's putting his point down on the paper firmly so that the compass won't slip off. I told him to grab the bottom part of the leg while he is pushing down on it. Contemplating on returning it and see if we can get the proper one to tighten the legs. But the inconvenience of it... sigh... If they could just replace the screw (if that screw can be replaced), that would be perfect. All other features function fine and would have been a great compass with 5 stars. Review: 10/10 - Muy bueno, estudio arquitectura y me ha funcionado para todo ## Features - Professional Compass With Universal Adapter, Extension Beam For Math, Geometry, Art, Drafting And Drawing, Creates Circles Up To 18 Inches In Diameter - Precision Geometry Compass With Spring Bow Head And Center Wheel Accompanied Quick Setting Adjustment With Push Button - Mechanism Prevents Unintentional Leg Movements - Premium Quality, Life-Time Satisfaction Guaranteed 10 Extra Lead, Spare Needle And Screws And Screw Driver Packaged In A Clear, Reusable Pouch. Easy To Carry And Store - Quality assurance, please feel free to give us feedback, we will get in touch with you within 24 hours. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MJVSB7D | | Best Sellers Rank | #47,284 in Office Products ( See Top 100 in Office Products ) #139 in Drafting Compasses | | Brand | Mr. Pen | | Customer Reviews | 4.2 4.2 out of 5 stars (2,558) | | Date First Available | 8 March 2019 | | Item Weight | 118 g | | Manufacturer | Mr. Pen | | Manufacturer Part Number | GP01 | | Material Type | Metal | | Model number | GP01 | | Package Dimensions | 16.99 x 7.01 x 1.7 cm; 118 g | ## Images ![Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry - Image 1](https://m.media-amazon.com/images/I/71jcBnMQZRL.jpg) ![Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry - Image 2](https://m.media-amazon.com/images/I/81wmN0KedAL.jpg) ![Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry - Image 3](https://m.media-amazon.com/images/I/81nWxcQ8xaL.jpg) ![Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry - Image 4](https://m.media-amazon.com/images/I/71lboQ12shL.jpg) ![Mr. Pen- Professional Compass with Lock, Up to 18 inch Diameter, Compass for Geometry, Drafting Compass, Precision Compass Math, Compass Drawing, Compass with Wheel, Metal Compass Geometry - Image 5](https://m.media-amazon.com/images/I/81nT7LN8O9L.jpg) ## Questions & Answers **Q: What is the maximum diameter? The description says 18" while the video says 24"** A: With the "extender leg" attached I am able to open the compass to a diameter of 11.5". I don't see how you could expand it to 18" or 24". **Q: Can you use this with other drawing utensils like markers?** A: Yes you can use markers and pens and pencils. Built in there is a lead, but there's an attachment that lets you use any kind of writing pen/marker/pencil that is up to 1/2 in diameter. **Q: What is the diameter of the lead? I need more than the standard black lead. Most compass's are 2mm>** A: This is also 2mm. Make one, there's plenty of cool compass plans available online. That's what I did for my trammel points (beam compass) **Q: Does the small compass use the same 2 mm replacement leads?** A: Yes ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great features, solid and awesome customer service *by E***A on 30 July 2019* Update: I contacted the seller and his response was super fast and sorted out the problem right away. We now have a compass that works well and that one must have been a one off one that has a problem. My son loves it and the feature where you push both bottoms to expand it quickly is super useful when he is doing his geometry homework. That way, he doesn’t have waste time using the small dial to expand the leg or reduce the size. ————- (Old review) I was excited to get this for my son for his Geometry class. So was he. All are great such as refills, extra screws, the little metal plate as a screw driver to tighten the screw for the leg that bends, additional leg to draw a big circle (although this isn't necessary for his class), but one slight oversight which is annoying to use is the screw that tightens the legs from bending. The screw head is so shallow, I cannot tighten it before threading the screw. Needless to say that I cannot tighten it. So, when my son uses it, it kept bending when he's putting his point down on the paper firmly so that the compass won't slip off. I told him to grab the bottom part of the leg while he is pushing down on it. Contemplating on returning it and see if we can get the proper one to tighten the legs. But the inconvenience of it... sigh... If they could just replace the screw (if that screw can be replaced), that would be perfect. All other features function fine and would have been a great compass with 5 stars. ### ⭐⭐⭐⭐⭐ 10/10 *by M***O on 17 March 2021* Muy bueno, estudio arquitectura y me ha funcionado para todo ### ⭐ 作りが雑 *by 烏***烏 on 27 October 2022* あちこち曲がってたり、作りが雑で使いもんになんねー ## Frequently Bought Together - Mr. Pen- Professional Metal Compass with Wheel and Lock for Geometry, Compass Geometry Tool, Drawing Compass, Drafting Compass, Math Compass, Geometry Compass, Compass Drawing Tool, Compass Math - DIYSELF 1 Pcs Craft Hobby Knife Exacto Knife with 11 Pcs Stainless Steel Blade Kit, 1pcs Steel 15CM Ruler for Art, Scrapbooking, Stencil (Purple) - Calligraphy Pen Set --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/263716582-mr-pen-professional-compass-with-lock-up-to-18-inch](https://www.desertcart.pt/products/263716582-mr-pen-professional-compass-with-lock-up-to-18-inch) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-11-10*