---
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: "€ 29.30"
currency: EUR
in_stock: true
reviews_count: 5
category: "Mr. Pen"
url: https://www.desertcart.fi/products/263716582-mr-pen-professional-compass-with-lock-up-to-18-inch
store_origin: FI
region: Finland
---

# 18" Diameter Lock Mechanism Precision Drawing 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:** € 29.30
**Availability:** ✅ In Stock

## Summary

> 🎨 Draw the Line Between Ordinary and Extraordinary!

## 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?** € 29.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/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

- • **Built to Last:** Premium metal construction with a lifetime satisfaction guarantee.
- • **Stay in Control:** Quick setting adjustment with a push button mechanism.
- • **All-in-One Convenience:** Includes 10 extra leads, spare needle, and a handy pouch.
- • **Unleash Your Creativity:** Craft perfect circles up to 18 inches with ease!
- • **Precision at Your Fingertips:** Spring bow head and center wheel for flawless geometry.

## Overview

The Mr. Pen Professional Compass is designed for precision in geometry, drafting, and art. With a maximum circle diameter of 18 inches, it features a robust metal construction, a quick adjustment mechanism, and comes with additional leads and tools for a complete drawing experience. Perfect for professionals and students alike, this compass ensures accuracy and ease of use.

## 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: This is such a great set. Im using this for drawing and there are so many great options.
Review: Great product for my son doing his GCSE. Compass with screw adjustment is so much better that the cheap ones with pencils in. well worth the extra money

## 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 | #66,341 in Office Products ( See Top 100 in Office Products ) #137 in Drafting Compasses |
| Brand | Mr. Pen |
| Customer Reviews | 4.4 4.4 out of 5 stars (3,653) |
| 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)

## Available Options

This product comes in different **Style** options.

## 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

### ⭐⭐⭐⭐⭐ Review
*by J***E on 10 January 2026*

This is such a great set. Im using this for drawing and there are so many great options.

### ⭐⭐⭐⭐⭐ Review
*by O***S on 3 December 2025*

Great product for my son doing his GCSE. Compass with screw adjustment is so much better that the cheap ones with pencils in. well worth the extra money

### ⭐⭐⭐⭐⭐ Review
*by J***R on 20 October 2025*

I used this in my woodshop to layout circles up to 8 inch radius. This required the extension bar that is included with the kit. It worked well, both on smaller circles and those requiring the extension. This was not an ultra-high precision application though, as I was laying out lines to guide carving. The tools in the kit are of decent quality, especially for the price. I am confident they will hold up over casual use. I don't know about using them for true precision drafting, as the mounting system for the extension and the pencil lead do not seem like they could be counted on the assemble the same way each time to sub-millimeter accuracy. But overall, the kit is fine for general woodworking.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.fi/products/263716582-mr-pen-professional-compass-with-lock-up-to-18-inch](https://www.desertcart.fi/products/263716582-mr-pen-professional-compass-with-lock-up-to-18-inch)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-09*