---
product_id: 341562684
title: "Professional Geometry Set Metal Compass, 7 pcs, Geometry Precision Tool Set with Shatterproof Storage Box, Drafting Tools & Drafting Kits"
brand: "mr. pen"
price: "$781"
currency: MXN
in_stock: true
reviews_count: 6
url: https://www.desertcart.mx/products/341562684-professional-geometry-set-metal-compass-7-pcs-geometry-precision-tool
store_origin: MX
region: Mexico
---

# Up to 20-inch circles Spring bowhead for precision Interchangeable attachments Professional Geometry Set Metal Compass, 7 pcs, Geometry Precision Tool Set with Shatterproof Storage Box, Drafting Tools & Drafting Kits

**Brand:** mr. pen
**Price:** $781
**Availability:** ✅ In Stock

## Summary

> 🎨 Draw your future in perfect circles with Mr. Pen!

## Quick Answers

- **What is this?** Professional Geometry Set Metal Compass, 7 pcs, Geometry Precision Tool Set with Shatterproof Storage Box, Drafting Tools & Drafting Kits by mr. pen
- **How much does it cost?** $781 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/341562684-professional-geometry-set-metal-compass-7-pcs-geometry-precision-tool)

## 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

- • **Circle Up to 20 Inches:** Create large, perfect circles effortlessly—ideal for drafting, art, and geometry projects.
- • **All-in-One Creative Kit:** Two compasses plus attachments packaged neatly for the multitasking professional artist or manager.
- • **Versatile Drawing Power:** Includes extension beam and slip handle for pens, pencils, stylus, or markers—adapt to any creative tool.
- • **Master Precision Geometry:** Spring bowhead and center wheel lock for zero slip and flawless circles every time.
- • **Professional-Grade Durability:** Crafted from sturdy metal with a sleek reusable case for on-the-go convenience and long-lasting use.

## Overview

Mr. Pen offers a professional-grade geometry compass set featuring two metal compasses, an extension beam, and interchangeable attachments. Designed for precision with a spring bowhead and center wheel to prevent slip, it creates circles up to 20 inches in diameter. Packaged in a clear, reusable box, it’s perfect for math, drafting, art, and creative professionals seeking reliable, versatile tools.

## Description

Full description not available

## Features

- The package includes 2 high-quality professional compasses, an extension beam, interchangeable attachments and a slip handle for pens, pencils, stylus or markers.
- Great for math, geometry, art, drafting, and drawing, creates circles up to 20 inches in diameter
- Precision geometry compass with spring bowhead and center wheel prevents unintentional leg movements
- Packaged in a clear, reusable box. Easy to carry and store

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Mr. Pen |
| Brand | Mr. Pen |
| Item Weight | 7.4 ounces |
| Package Dimensions | 8.66 x 3.94 x 1.02 inches |
| Item model number | GE01 |
| Material Type | Metal |
| Manufacturer Part Number | GE01 |

## Images

![Professional Geometry Set Metal Compass, 7 pcs, Geometry Precision Tool Set with Shatterproof Storage Box, Drafting Tools & Drafting Kits - Image 1](https://m.media-amazon.com/images/I/81gFn-7b+GL.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

### ⭐⭐⭐⭐⭐ Good set, works w/ mechanical pencils
*by J***Y on July 2, 2023*

Like it! But refillable lead is a pain, dulls quickly, breaks, must keep unscrewing to advance lead. Fortunately the Pencil holder attaches to larger compass and a slim mech. Pencil fits great, as shown in pic—that means advancing lead from end of pencil, no unscrewing, less interruption in drawing. For small compass w/ thick refillable lead, the sharpener is handy. Well worth the price, good quality!

### ⭐⭐⭐⭐⭐ i use this a lot, wish i had gotten it sooner
*by D***F on September 3, 2024*

this is a real quality instrument with a beam to increase the working radius. you may need to watch a video on how to use this, i do not have one.with this, you can do home remodeling to scale (architect ruler needed), home yard improvement/landscaping and many other things.comes in a good case, and i would give this as a gift if i had any friends (who would use it)

### ⭐⭐⭐⭐ Not a pretty picture, but neither was my first experience without any instructions.
*by L***Y on May 31, 2022*

What you see is my attempt to use my Mr. Pen set. I was looking forward to this set because I wanted to start working with mandalas. My only experience was high school geometry and that was limited to the usual cheap compass that came in a school supply set.The cute little mustache print and thank you included did not make up for the lack of instructions. It does say a professional set, so maybe I should have looked for a beginner set to learn the mechanics.I attempted on my own, but there were pieces included I simply didn't have a clue about. Again, I'm not a professional with a compass.I can't tell you how many times I had to chase that small screw when it flew off its pin. (I'm left handed and sometimes get righty-lefty backwards.) That pin is tiny. Be careful you don't lose it, or the screw head.I didn't understand the extender at all, so I turned to online videos. Mr. Pen does have a video, but it moves quickly. His hands are in the way sometimes. Not all the things in my box were addressed, so I still don't know what one thing is. I did manage to see enough on the video to figure out the extender. After I removed it, I realized the pen/pencil will slide back and forth on the extender to make different size circles along with screwing the compass wider or more narrow. I'm sure that will be a nice feature after I become more adept.While I was chasing those tiny screws, I saw the random marks on my paper you can see in the photo. I was trying to fit the pencil holder on the smaller compass to no avail. However, in that process, I noticed I made more marks. Well, what do you know? I discovered there's lead on one side for both compasses, you don't actually need a pencil unless you are doing the really big circles from the extender.Again, it could be my lack of experience, but some simple written instructions and photo showing parts would have been helpful and less frustrating.As it is advertised as a professional set, I don't have anything critical to say. I'm a professional artist, not architect. I'm imagine that made a difference in my experience. It seems sturdy enough, especially for how I will be using it.Eventually, I did figure most of the bits and pieces out. One thing included is supposed to be a screwdriver (from the video), but it looks like it has a blade and you need a tiny screw drive to turn it. I thought it was some sort of sharpener until I watched the video. I will have to watch again to figure out where and how to use it.The other thing I am clueless about. I can't tell you what it is because I don't have a name for it. It wasn't addressed in the video. It appears to attach somewhere to something. I'm sure, eventually, I will get it figured out.My experience with the set, may not be typical, but if you are a beginner using such tools as I am, I hope this review will give you advance idea of what you may be up against while setting it all up.As to the photo. I used a not so great photo because I thought it would give you an idea of the sizes you can make. You will see the random marks I referenced in my review. I just used a sheet of practice pad to make the circles.As I use my rulers for artwork, they are clear. I knew nothing would show up in the photo. What you see is a seam measure for sewing, but it has inches and metric on it. I made as small a circle as I could with the smaller compass and then as large as I could. The arcs off to the right side were made with larger compass, the extender and a pencil. I did not have the larger compass extended as far as it would go, but I did have the pencil extender at full length. I didn't have large enough paper at hand to complete the biggest circle, but you can get an idea of how large a circle this set can make. You can go from 1/2 inch diameter up to very large dinner plate sized circles that might be good for murals, signs etc.Again, I think this set will be good for my purpose after I get better at using it, but instructions would have been so helpful.

## Frequently Bought Together

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-01-31*