---
product_id: 72328654
title: "Metric Engineer Scale Ruler, Ruler, 12\" Aluminum Scale Ruler, Triangular Scale, Scale Ruler for Blueprint, Triangle Ruler, Metric Engineering, Drafting Ruler"
brand: "mr. pen"
price: "$16.17"
currency: USD
in_stock: true
reviews_count: 11
category: "Mr. Pen"
url: https://www.desertcart.us/products/72328654-metric-engineer-scale-ruler-ruler-12-aluminum-scale-ruler-triangular
store_origin: US
region: United States of America
---

# Color-coded scales 30cm precision length Triangular aluminum build Metric Engineer Scale Ruler, Ruler, 12" Aluminum Scale Ruler, Triangular Scale, Scale Ruler for Blueprint, Triangle Ruler, Metric Engineering, Drafting Ruler

**Brand:** mr. pen
**Price:** $16.17
**Availability:** ✅ In Stock

## Summary

> 📐 Draft like a pro, measure like a boss!

## Quick Answers

- **What is this?** Metric Engineer Scale Ruler, Ruler, 12" Aluminum Scale Ruler, Triangular Scale, Scale Ruler for Blueprint, Triangle Ruler, Metric Engineering, Drafting Ruler by mr. pen
- **How much does it cost?** $16.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/72328654-metric-engineer-scale-ruler-ruler-12-aluminum-scale-ruler-triangular)

## 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 Endure:** High-impact aluminum construction ensures durability through every project.
- • **Laser-etched Accuracy:** Markings that never fade or scratch, guaranteeing lifelong precision.
- • **Versatile Metric Scales:** Includes 1:20, 1:25, 1:50, 1:75, 1:100, and 1:125 for all your drafting needs.
- • **Instant Scale Recognition:** Color-coded triangular faces speed up your workflow with quick scale selection.
- • **Precision at Your Fingertips:** 30cm engineered for flawless architectural and blueprint measurements.

## Overview

The Mr. Pen Metric Engineer Scale Ruler is a 30cm triangular aluminum drafting tool designed for professionals who demand precision and durability. Featuring laser-etched, color-coded metric scales from 1:20 to 1:125, it ensures quick, accurate measurements on blueprints and architectural drawings. Lightweight yet robust, this ruler is built to last and perfect for engineers, architects, and designers aiming to elevate their drafting game.

## Description

desertcart.com : Mr. Pen- Metric Engineer Scale Ruler, Ruler, 12" Aluminum Scale Ruler, Triangular Scale, Scale Ruler for Blueprint, Triangle Ruler, Metric Engineering, Drafting Ruler : Office Products

Review: excellent - excellent product
Review: Solid, accurate and easy to read scale - This is a decent, well made product. The markings (on my scale, at least) were clearly etched on - I can feel the slight indentation of the metal where the markings are placed. The markings are clear and crisp. The color coding on each side of the scale is a nice feature. I would suggest that the seller take another look at this page and fix some of the product photos and descriptive copy. It almost appears as if they just used the same page for both their metric and imperial scales. Some of the pictures show imperial scales, while this item is definitely METRIC scaled. I'm not complaining about the product I got - I ordered a metric scale, and that's what I got. But people might be mislead as to what they are getting - even the text has some ambiguities. I do agree with some of the other reviewers in noting that the ends of the ruler can be a bit sharp. A minute or so spent with some fine grit sandpaper will take care of this, but I think that this should be done at the manufacturing stage.

## Features

- 30cm Engineer Scale Designed To Facilitate The Drafting And Measuring Of Architectural Drawings, Such As Floor Plans, Blue Prints, And Orthographic Projections
- Triangular Ruler Made From High Impact Aluminum, Build To Last
- Engineer Ruler With Durable Laser Cut Prints For Accuracy. They Will Not Wipe Or Scratch Off Ever
- Color Coded Triangular Scale For Easy And Quick Selection Of The Desired Scale
- Scale: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07DNKNLSJ |
| Best Sellers Rank | #71,328 in Office Products ( See Top 100 in Office Products ) #250 in Drafting Tools & Drafting Kits |
| Date First Available | June 13, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.52 ounces |
| Manufacturer | Mr. Pen |
| Product Dimensions | 11.81 x 3.39 x 0.04 inches |

## Product Details

- **Brand:** Mr. Pen
- **Color:** White
- **Material:** Aluminum
- **Product Dimensions:** 3.39"W
- **Style:** Triangular

## Images

![Metric Engineer Scale Ruler, Ruler, 12" Aluminum Scale Ruler, Triangular Scale, Scale Ruler for Blueprint, Triangle Ruler, Metric Engineering, Drafting Ruler - Image 1](https://m.media-amazon.com/images/I/71o5e1uvbQL.jpg)

## Questions & Answers

**Q: Do markings stay on this ruler?**
A: It seems your mileage may vary.  Some people say they received a ruled with etched/engraved markings.  I just received one of these and the markings are just printed on top of the aluminum - they are not etched could come off.

## Customer Reviews

### ⭐⭐⭐⭐⭐ excellent
*by M***E on November 9, 2025*

excellent product

### ⭐⭐⭐⭐⭐ Solid, accurate and easy to read scale
*by M***Z on July 21, 2020*

This is a decent, well made product. The markings (on my scale, at least) were clearly etched on - I can feel the slight indentation of the metal where the markings are placed. The markings are clear and crisp. The color coding on each side of the scale is a nice feature. I would suggest that the seller take another look at this page and fix some of the product photos and descriptive copy. It almost appears as if they just used the same page for both their metric and imperial scales. Some of the pictures show imperial scales, while this item is definitely METRIC scaled. I'm not complaining about the product I got - I ordered a metric scale, and that's what I got. But people might be mislead as to what they are getting - even the text has some ambiguities. I do agree with some of the other reviewers in noting that the ends of the ruler can be a bit sharp. A minute or so spent with some fine grit sandpaper will take care of this, but I think that this should be done at the manufacturing stage.

### ⭐⭐⭐⭐⭐ Great product! No issues at all.
*by J***E on April 18, 2024*

This is a great metric ruler for the money! I did not have any damage issues other reviewers were talking about. I am not an architect or engineer but CAD and 3D print for scale model kits (mainly in 1/35, 1/16, and 1/48 scales). This ruler is sturdy and handy for my uses. Highly recommended!

## Frequently Bought Together

- Partyreal CA11755
- Staedtler 12-Inches Engineers Triangular Scale (98718-34BK)
- Mr. Pen Architectural Scale Ruler, 12 Inch, White, Contractor's Scaling Ruler, Drawing & Drafting Tool

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-20*