---
product_id: 50359888
title: "Helix 45cm Tri-Scale Triangular Ruler"
brand: "helix"
price: "R27"
currency: ZAR
in_stock: true
reviews_count: 13
url: https://www.desertcart.co.za/products/50359888-helix-45cm-tri-scale-triangular-ruler
store_origin: ZA
region: South Africa
---

# 45cm precision length color-coded scales durable aluminum build Helix 45cm Tri-Scale Triangular Ruler

**Brand:** helix
**Price:** R27
**Availability:** ✅ In Stock

## Summary

> 📐 Elevate your measurements with precision and style — don’t settle for less!

## Quick Answers

- **What is this?** Helix 45cm Tri-Scale Triangular Ruler by helix
- **How much does it cost?** R27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/50359888-helix-45cm-tri-scale-triangular-ruler)

## Best For

- helix enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Robust construction that withstands daily use in office, school, or site
- • **Effortless Accuracy:** Color-coded sides and protective end caps prevent errors and paper damage
- • **Legacy of Excellence:** 130 years of British craftsmanship trusted by architects and engineers
- • **Precision Meets Versatility:** Tri-scale design with 12 metric ratios for every project scale
- • **Engineered for Professionals:** High-grade aluminum ensures lightweight durability on any drawing board

## Overview

The Helix 45cm Tri-Scale Triangular Ruler is a premium aluminum metric ruler featuring 12 color-coded scales from 1:1 to 1:2500, designed for architects, engineers, and students. Its durable yet lightweight construction, combined with protective plastic end caps, ensures precise, scratch-free measurements on A3 drawing boards. Backed by over 130 years of British design heritage, this ruler delivers professional-grade accuracy and longevity for all your technical drawing needs.

## Description

Product Description Made from high grade aluminium metal this 45cm/18 inch long ruler is ideal for use on A3 drawing boards. It has two plastic caps on either end to stop the edges catching or scratching the paper. Each side is colour coded for clear use. This triangular triangle scale metric ruler can be used in the office or school as it is light weight yet durable. Helix was founded 130 years ago in the Midlands, England with a view to offer customers high quality, sturdy and durable stationery to use every day in school, at home or in work. Today Helix's product range may have grown from where it all started 130 years ago but Helix still has the love and passion for stationery that it always had, as well as the desire to offer people the best of British design and function in their everyday stationery use. Manufacturer's Description High quality tri-scale rule for the older student and the professional. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Box Contains 1 x Tri-Scale Ruler See more

Review: Good quality and robust - This is a great purchase, I bought it for the builders working on my extension so they can easily read off actual measurements. Works very well and would reccommend.
Review: All you need - If you work in construction/architecture these are all the scales you will need. This ruler is easy to read and well made and will last you years.

## Features

- Aluminum triangular scale metric ruler
- 45cm/18 inches length makes it perfect for use on A3 drawing boards
- Colour coded for ease of use with plastic caps on end to protect paper
- Ideal for Architects, designers, students and engineers
- 1:1 / 1:2 / 1:5 / 1:10 / 1:20 / 1:50 / 1:100 / 1:200 / 1:500 / 1:1000 / 1: 1250 / 1:2500

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0052KAXVO |
| Best Sellers Rank | 391,617 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 2,350 in Rulers (Stationery & Office Supplies) |
| Brand | Helix |
| Colour | Red, White |
| Customer Reviews | 4.5 4.5 out of 5 stars (338) |
| Date First Available | 25 May 2011 |
| Item Weight | 180 g |
| Manufacturer | Helix |
| Manufacturer Part Number | T51070 |
| Material Type | Aluminium, Metal, Plastic |
| Model Number | T51070 |
| Product Dimensions | 21.11 x 2.21 x 3 cm; 180 g |
| Size | 45 CM |

## Product Details

- **Brand:** Helix
- **Colour:** Red, White
- **Graduation range:** 0-18 Inches
- **Material:** Aluminium, Metal, Plastic
- **Style:** Triangular

## Images

![Helix 45cm Tri-Scale Triangular Ruler - Image 1](https://m.media-amazon.com/images/I/51uFFasMc-L.jpg)
![Helix 45cm Tri-Scale Triangular Ruler - Image 2](https://m.media-amazon.com/images/I/61JVQ-zfkGL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality and robust
*by A***R on 24 May 2023*

This is a great purchase, I bought it for the builders working on my extension so they can easily read off actual measurements. Works very well and would reccommend.

### ⭐⭐⭐⭐⭐ All you need
*by D***T on 22 December 2022*

If you work in construction/architecture these are all the scales you will need. This ruler is easy to read and well made and will last you years.

### ⭐⭐⭐⭐⭐ Very practical
*by E***D on 1 April 2020*

Especially for model making, this is a wonderful ruler to have, and significantly better than the plastic versions that exist. The printing doesn't wear off, as it does on plastic ones, and the aluminium holds up well when used to cut with a scalpel - to scale!

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**Shop now:** [https://www.desertcart.co.za/products/50359888-helix-45cm-tri-scale-triangular-ruler](https://www.desertcart.co.za/products/50359888-helix-45cm-tri-scale-triangular-ruler)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-21*