---
product_id: 344128079
title: "Mr. Pen - Bow Compass 4 inch"
brand: "mr. pen"
price: "¥137"
currency: JPY
in_stock: false
url: https://www.desertcart.jp/products/344128079-mr-pen-bow-compass-4-inch
store_origin: JP
region: Japan
---

# Up to 8-inch circles All-metal, nickel-plated durability Spring bow head for precision Mr. Pen - Bow Compass 4 inch

**Brand:** mr. pen
**Price:** ¥137
**Availability:** ❌ Out of Stock

## Summary

> 🎨 Draw with precision, draft with confidence.

## Quick Answers

- **What is this?** Mr. Pen - Bow Compass 4 inch by mr. pen
- **How much does it cost?** ¥137 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/344128079-mr-pen-bow-compass-4-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

- • **Travel-Ready Design:** Comes in a clear, reusable pouch—carry your precision tool anywhere with style.
- • **Effortless Adjustments:** Knurled grip and easy-to-move legs let you dial in exact measurements quickly.
- • **Versatile Drawing Range:** Create circles from tiny sketches to bold 8-inch diameters with ease.
- • **Built to Last a Lifetime:** All-metal, nickel-plated construction ensures durability and a professional finish.
- • **Precision in Every Circle:** Spring bow head and center wheel lock legs to prevent slips—perfect for flawless geometry and art.

## Overview

The Mr. Pen Bow Compass 4 inch is a professional-grade drafting tool designed for math, geometry, art, and technical drawing. It features a spring bow head and center wheel to prevent leg movement, allowing precise circles up to 8 inches in diameter. Crafted from all-metal with nickel plating, it offers durability and a premium feel. Easy to adjust and packaged in a reusable pouch, it’s perfect for professionals and creatives on the go.

## Description

Mr. Pen - Bow Compass 4 inch

## 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 |
|---------------|-------|
| Manufacturer | Mr. Pen |
| Brand | Mr. Pen |
| Model Number | GS01 |
| Grip Type | Knurled |
| Material | Metal |
| Manufacturer Part Number | GS01 |
| Manufacturer | Mr. Pen |

## Product Details

- **Brand:** Mr. Pen
- **Age Range (Description):** Adult
- **Material:** Metal
- **Special Feature:** Portable
- **Recommended Uses For Product:** Art, Drafting, Drawing, Geometry

## Images

![Mr. Pen - Bow Compass 4 inch - Image 1](https://m.media-amazon.com/images/I/61s3v5EVBOL.jpg)
![Mr. Pen - Bow Compass 4 inch - Image 2](https://m.media-amazon.com/images/I/716tz3XvqqL.jpg)
![Mr. Pen - Bow Compass 4 inch - Image 3](https://m.media-amazon.com/images/I/71nxMdpCftL.jpg)
![Mr. Pen - Bow Compass 4 inch - Image 4](https://m.media-amazon.com/images/I/81Qu27OXExL.jpg)
![Mr. Pen - Bow Compass 4 inch - Image 5](https://m.media-amazon.com/images/I/81bKA8oZ6NL.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,

## 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.jp/products/344128079-mr-pen-bow-compass-4-inch](https://www.desertcart.jp/products/344128079-mr-pen-bow-compass-4-inch)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-31*