---
product_id: 38278775
title: "OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125"
brand: "ocm brand"
price: "€ 30.35"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ocm Brand"
url: https://www.desertcart.at/products/38278775-ocm-metric-triangular-engineer-scale-ruler-proffessional-grade-solid-aluminum
store_origin: AT
region: Austria
---

# 6 precise metric scales Solid aluminum build Concave base for smudge-free lines OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125

**Brand:** ocm brand
**Price:** € 30.35
**Availability:** ✅ In Stock

## Summary

> 📐 Elevate your drafting game with precision that lasts a lifetime!

## Quick Answers

- **What is this?** OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 by ocm brand
- **How much does it cost?** € 30.35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/38278775-ocm-metric-triangular-engineer-scale-ruler-proffessional-grade-solid-aluminum)

## Best For

- ocm brand enthusiasts

## Why This Product

- Trusted ocm brand brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smudge-Free Drafting:** Innovative concave base minimizes ink smearing, keeping your blueprints flawless.
- • **Ergonomic Triangular Design:** Safe, comfortable grip that doubles as a cutting guide for precise scoring.
- • **Precision in Every Millimeter:** Six professional-grade metric scales (1:20 to 1:125) tailored for engineers and architects.
- • **Built to Last, Designed to Impress:** Crafted from solid aluminum for durability that outperforms plastic rulers—no fading, no wear.
- • **Trusted by Pros, Loved by Creatives:** Highly rated with 4.7 stars and glowing reviews from industry experts.

## Overview

The OCM Metric Triangular Engineer Scale Ruler is a professional-grade, solid aluminum drafting tool featuring six precise metric scales from 1:20 to 1:125. Its ergonomic triangular design ensures safer handling and smudge-free drawing with a concave base, making it ideal for engineers, architects, and technical illustrators seeking durability and accuracy.

## Description

Product description Professional's First Choice Every drawing deserves the precision and quality that the OCM 30cm Triangular Metric Engineer Scale provides. 6 Precision Metric Scales 1:20 1:25 1:50 1:75 1:100 1:125 Solid Aluminum Triangular Body Constructed of Solid High-Grade Aluminum to reduce flex and warping. This allows the ruler to lay flat on the drawing surface for precise and accurate placement. The concave design feature helps reduce smearing for clean pencil lines. The Perfect Choice for Architects, Engineers, and Students Your work deserves the best in Precision and Quality. The OCM Scale is the perfect tool for any Architect, Draftsman, Engineer, or Student. Ideal for Your Next Project You expect the best from OCM and that's exactly what you'll get. Solid construction and precise performance. Let the OCM 30cm Triangular Metric Engineer Scale be your first choice for optimal accuracy on your next set of drawings

Review: Amazing product - Works perfectly
Review: Professional Grade Scale Ruler - I'm very pleased with this scale ruler. It is way better than the plastic screen-printed rulers that I have used in the past where the markings would eventually rub off. This ruler is made from solid aluminum and features die-engraved markings that are easy to read and should last forever. I would highly recommend this professional quality product to anyone.

## Features

- SOLID ALUMINUM 30cm METRIC - Engineer, Mechanical, Architectural, Draftsman scale ruler with triangular body for safer cutting and scoring of materials.
- PRECISE SCALES - 1:20, 1:25, 1:50, 1:75, 1:100, 1:125. For professional applications, architecture, engineering, and technical Illustration
- PRECISION MARKED METRIC GRADATIONS (NOT IMPERIAL) - Easy-to-read printed gradations.
- 3 SIDES with 6 METRIC SCALES - Concave base reduces smearing when drawing.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MQSQJCJ |
| Best Sellers Rank | #107,394 in Office Products ( See Top 100 in Office Products ) #344 in Drafting Tools & Drafting Kits |
| Brand | OCM Brand |
| Brand Name | OCM Brand |
| Color | Chrome |
| Customer Reviews | 4.6 out of 5 stars 271 Reviews |
| Graduation Range | 30 Centimeters |
| Item Dimensions L x W | 12.5"L x 1"W |
| Item Weight | 3.2 Ounces |
| Manufacturer | OCM |
| Material | Aluminum |
| Material Type | Aluminum |
| Model | OP-33808 |
| Part Number | R12M |
| Product Dimensions | 12.5"L x 1"W |
| Style | Classic |
| Style Name | Classic |
| UPC | 697691528502 |

## Product Details

- **Brand:** OCM Brand
- **Color:** Chrome
- **Graduation Range:** 30 Centimeters
- **Material:** Aluminum
- **Style:** Classic

## Images

![OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 - Image 1](https://m.media-amazon.com/images/I/61yLzQN6wnL.jpg)
![OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 - Image 2](https://m.media-amazon.com/images/I/61LbVAwnMUL.jpg)
![OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 - Image 3](https://m.media-amazon.com/images/I/71nzr+ftQQL.jpg)
![OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 - Image 4](https://m.media-amazon.com/images/I/51jmv7g9QCL.jpg)
![OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 - Image 5](https://m.media-amazon.com/images/I/71bn5Aq4XqL.jpg)

## Questions & Answers

**Q: Why is your 1:125 scale so far off? No QA department?**
A: You sure you are working in METRIC?

**Q: This is cm or inch?**
A: Cm/mm

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing product
*by K***O on August 21, 2023*

Works perfectly

### ⭐⭐⭐⭐⭐ Professional Grade Scale Ruler
*by F***S on January 16, 2017*

I'm very pleased with this scale ruler. It is way better than the plastic screen-printed rulers that I have used in the past where the markings would eventually rub off. This ruler is made from solid aluminum and features die-engraved markings that are easy to read and should last forever. I would highly recommend this professional quality product to anyone.

### ⭐⭐⭐⭐⭐ school supply
*by A***L on July 21, 2017*

My son is an engineering student and needed a new ruler. He said he really likes the features of this one. It seems to be sturdy, well-made, and easy to read.

## Frequently Bought Together

- OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125
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- Intoy 12 Inch Triangular Engineer Scale Ruler, Anodized Solid Aluminum Core with Laser Etched Scales, Imperial Scale - 1:10, 1:20, 1:30, 1:40, 1:50, 1:60, Ideal for Civil Engineering Drafting

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-05-09*