---
product_id: 207801654
title: "Mr. Pen- Professional Compass for Geometry, Extra Lead, Metal Compass, Compass, Compass Drawing Tool, Drawing Compass, Drafting Compass, Compass for Students, Compass Geometry"
brand: "mr. pen"
price: "HK$129"
currency: HKD
in_stock: true
reviews_count: 13
category: "Mr. Pen"
url: https://www.desertcart.hk/products/207801654-mr-pen-professional-compass-for-geometry-extra-lead-metal-compass
store_origin: HK
region: Hong Kong
---

# Up to 8-inch circles All-metal nickel plating Spring bow head for stability Mr. Pen- Professional Compass for Geometry, Extra Lead, Metal Compass, Compass, Compass Drawing Tool, Drawing Compass, Drafting Compass, Compass for Students, Compass Geometry

**Brand:** mr. pen
**Price:** HK$129
**Availability:** ✅ In Stock

## Summary

> 🖊️ Master your geometry game with precision and style!

## Quick Answers

- **What is this?** Mr. Pen- Professional Compass for Geometry, Extra Lead, Metal Compass, Compass, Compass Drawing Tool, Drawing Compass, Drafting Compass, Compass for Students, Compass Geometry by mr. pen
- **How much does it cost?** HK$129 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/207801654-mr-pen-professional-compass-for-geometry-extra-lead-metal-compass)

## 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-In Stability:** Spring bow head and center wheel prevent unwanted leg shifts for flawless geometry.
- • **Durable Metal Build:** Crafted from nickel-plated metal for a lifetime of reliable use.
- • **Portable & Organized:** Comes in a clear reusable pouch—carry your drafting essentials in style.
- • **Effortless Adjustments:** Smooth leg adjustments ensure precise, professional-grade drawings.
- • **Precision Circles Every Time:** Draw perfect circles up to 8 inches with unmatched accuracy.

## Overview

The Mr. Pen Professional Compass is a high-quality, all-metal drafting tool designed for students and professionals alike. It features a spring bow head and center wheel to maintain stability, allowing you to draw circles up to 8 inches in diameter with precision. Lightweight yet durable, it includes extra lead and comes packaged in a reusable pouch for easy storage and portability. Ideal for math, geometry, art, and drafting tasks, this compass combines functionality with lasting reliability.

## Description

desertcart.com : Mr. Pen- Professional Compass for Geometry, Extra Lead, Metal Compass, Compass, Compass Drawing Tool, Drawing Compass, Drafting Compass, Compass for Students, Compass Geometry : Office Products

Review: A real, sturdy tool - Sturdy and rigid. A real tool. Not like that flimsy piece of junk my daughter was using before. Geometry makes sense to her now!
Review: Economical Yet Functional - This is not a professional quality tool and is limited on the min/max width. It's an economical tool that does what it's supposed to do. It doesn't lock, strictly speaking, but the adjustment wheel is firm enough. It comes with 10-15 replacement leads. Comically, two of the three little vials containing lead were empty and their contents were rolling around in the little bag. One of them still had the cap on it, so I have to think the person packing it was all out of effs to give that day and just dumped the required number of parts in the bag instead of trying to fix it. Two steel tip replacements, two little tightening wheel replacements and strangely no little screw replacements. A mustache sticker and a hand-written thank you note. It's stable enough for what I need to use it for. Doesn't have as much flex as some folks have reported. But if you're looking for a tool with tight tolerances and high production value for architecture or engineering use, go spend $100 - 200+ on a different product.

## Features

- 1 High Quality Professional Bow Compass For Math, Geometry, Art, Drafting And Drawing; Creates Circles Up To 8 Inches In Diameter
- Precision Geometry Compass With Spring Bow Head And Center Wheel Prevents Unintentional Leg Movements
- All Metal, Nickel Plating Compass, Lifelong Satisfaction Guaranteed
- Easy To Adjust Legs, Great For Precise Drawings
- Packaged In A Clear, Reusable Pouch. Easy To Carry And Store

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B086R77B7Y |
| Best Sellers Rank | #2,242 in Office Products ( See Top 100 in Office Products ) #1 in Drafting Compasses |
| Brand | Mr. Pen |
| Color | Silver |
| Customer Reviews | 4.4 4.4 out of 5 stars (8,357) |
| Date First Available | April 3, 2020 |
| Grip Type | Smooth |
| Item Weight | 2.08 ounces |
| Item model number | GS01 |
| Line Size | 0.3mm |
| Manufacturer | Mr. Pen |
| Manufacturer Part Number | GS01 |
| Material Type | Metal |
| Number of Items | 1 |
| Package Dimensions | 7.24 x 3.43 x 0.51 inches |
| Size | 1 Count (Pack of 1) |

## Product Details

- **Age Range (Description):** Kid, Teen, Adult
- **Brand:** Mr. Pen
- **Color:** Silver
- **Material:** Metal
- **Writing Instrument Form:** Technical Pen

## Images

![Mr. Pen- Professional Compass for Geometry, Extra Lead, Metal Compass, Compass, Compass Drawing Tool, Drawing Compass, Drafting Compass, Compass for Students, Compass Geometry - Image 1](https://m.media-amazon.com/images/I/61s3v5EVBOL.jpg)

## Questions & Answers

**Q: Are extra leads easily available, if needed?**
A: Hi, Thank you for your question. You can just message us on Amazon or email us and we will ship you extra lead anytime. free of charge.

**Q: How small is the smallest drawable circle?**
A: I just drew a circle in the all-the-way closed position. It was 5/8".

**Q: No matter how much i tighten the screws, both the lead and needle push up when i try to draw a circle. how can i prevent this?**
A: When I replace the lead I make sure the screws are loose enough for me to slide the lead all the way to the back of the compass. Then tighten it slowly and make sure the lead hasn’t moved while I tighten it more. I had the same problem when I first replaced the lead but found the right way to tighten the lead.

**Q: Can you use chalk instead of lead?**
A: No. The holder on the compass isn't big enough.  If you wand to tape chalk to the arm it might work,

## Customer Reviews

### ⭐⭐⭐⭐⭐ A real, sturdy tool
*by J***E on January 17, 2026*

Sturdy and rigid. A real tool. Not like that flimsy piece of junk my daughter was using before. Geometry makes sense to her now!

### ⭐⭐⭐⭐⭐ Economical Yet Functional
*by J***E on May 5, 2024*

This is not a professional quality tool and is limited on the min/max width. It's an economical tool that does what it's supposed to do. It doesn't lock, strictly speaking, but the adjustment wheel is firm enough. It comes with 10-15 replacement leads. Comically, two of the three little vials containing lead were empty and their contents were rolling around in the little bag. One of them still had the cap on it, so I have to think the person packing it was all out of effs to give that day and just dumped the required number of parts in the bag instead of trying to fix it. Two steel tip replacements, two little tightening wheel replacements and strangely no little screw replacements. A mustache sticker and a hand-written thank you note. It's stable enough for what I need to use it for. Doesn't have as much flex as some folks have reported. But if you're looking for a tool with tight tolerances and high production value for architecture or engineering use, go spend $100 - 200+ on a different product.

### ⭐⭐⭐⭐ Does the job, but clearly a low-budget item
*by A***0 on May 10, 2024*

This compass does the job of a compass and does it very well. They even throw in some extra lead and a little storage pouch too! But while it does its job well, it doesn’t really scream “quality” at all. A big disappointment was when I first saw it and noticed it’s painted. Not anodized or coated, it’s paint and it’s obviously paint, with small lumps and uneven spots. In my opinion it doesn’t look much like the images other than in shape, with the color not looking close at all. The other point against: the adjustment screw is not centered between the arms. If set as wide as possible this is very obvious and is likely limiting the total amount of adjustment. It’s certainly not a professional-level product but then again it’s not a professional-level price either. It’ll draw a circle or an arc, help you measure things, and even scribe some things like I have, but it won’t win any awards for build quality.

## Frequently Bought Together

- Mr. Pen- Professional Compass for Geometry, Extra Lead, Metal Compass, Compass, Compass Drawing Tool, Drawing Compass, Drafting Compass, Compass for Students, Compass for Woodworking, Compass Geometry
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**Shop now:** [https://www.desertcart.hk/products/207801654-mr-pen-professional-compass-for-geometry-extra-lead-metal-compass](https://www.desertcart.hk/products/207801654-mr-pen-professional-compass-for-geometry-extra-lead-metal-compass)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-31*