---
product_id: 88733911
title: "Mr. Pen - T Square, T Ruler, 12 inch Metal Ruler, T Square Ruler | Drafting Tools, Architect Ruler, Set Square, Drafting Ruler, Tsquare, Truler, Architectural Triangle, Tee Ruler, L Square"
brand: "mr. pen"
price: "R499"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Mr. Pen"
url: https://www.desertcart.co.za/products/88733911-mr-pen-t-square-t-ruler-12-inch-metal-ruler
store_origin: ZA
region: South Africa
---

# 12-inch precision length Dual-sided laser-etched measurements High-impact carbon steel durability Mr. Pen - T Square, T Ruler, 12 inch Metal Ruler, T Square Ruler | Drafting Tools, Architect Ruler, Set Square, Drafting Ruler, Tsquare, Truler, Architectural Triangle, Tee Ruler, L Square

**Brand:** mr. pen
**Price:** R499
**Availability:** ✅ In Stock

## Summary

> 📐 Elevate your craft with precision that commands attention.

## Quick Answers

- **What is this?** Mr. Pen - T Square, T Ruler, 12 inch Metal Ruler, T Square Ruler | Drafting Tools, Architect Ruler, Set Square, Drafting Ruler, Tsquare, Truler, Architectural Triangle, Tee Ruler, L Square by mr. pen
- **How much does it cost?** R499 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/88733911-mr-pen-t-square-t-ruler-12-inch-metal-ruler)

## 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 Last:** Crafted from high-impact carbon steel to withstand rigorous daily use without warping or wear.
- • **Trusted by Pros:** Highly rated by architects, engineers, and artists who demand precision and durability.
- • **Calibrated for Accuracy:** 8-inch (20cm) T-head ensures perfect alignment and straight edges for professional results.
- • **Multi-Functional Design:** Functions as a T square, L square, and ruler—your all-in-one drafting essential.
- • **Precision Meets Versatility:** Dual-sided graduations in 1/16 inch and 1mm for flawless measurements every time.

## Overview

The Mr. Pen 12-inch T Square is a premium carbon steel drafting tool featuring dual-sided laser-etched measurements in both inches and centimeters. Designed for architects, engineers, and artists, it combines durability with multifunctionality—serving as a T square, L square, and ruler. Its calibrated 8-inch T-head ensures impeccable alignment, making it a must-have for professionals seeking precision and reliability.

## Description

Buy Mr. Pen - T Square, T Ruler, 12 inch Metal Ruler, T Square Ruler | Drafting Tools, Architect Ruler, Set Square, Drafting Ruler, Tsquare, Truler, Architectural Triangle, Tee Ruler, L Square: Drafting Tools & Kits - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Nice and sturdy - I'm very pleased with the quality of this T square. Very sturdy
Review: It has measurements on both sides. Onecentimeters and inches, and the other side shows. - Excellent product, even better than I expected. The quality is indescribable. Measures on both sides. Ideal for precision in crafts and other projects. 100% recommend. Received on time.

## Features

- Black T ruler (12in), perfect for architects, engineers and artists
- Made from high impact carbon steel for durability
- T-ruler is largely and accurately laser printed on both sides. Inch and centimeter measurements (graduated in 16th of inch and 1mm)
- Can be used as T square, L square, L ruler
- 8inch/20cm calibrated t head

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07F1ZFV69 |
| Best Sellers Rank | #28,903 in Office Products ( See Top 100 in Office Products ) #153 in Drafting Tools & Drafting Kits |
| Brand | Mr. Pen |
| Brand Name | Mr. Pen |
| Color | black, white |
| Customer Reviews | 4.6 out of 5 stars 3,603 Reviews |
| Graduation Range | 1/16 inches |
| Item Dimensions L x W | 12"L x 8"W |
| Item Weight | 1 g |
| Manufacturer | Mr. Pen |
| Material | Carbon Steel , Metal |
| Material Type | Carbon Steel, Metal |
| Model | TS12 |
| Number of Items | 1 |
| Part Number | TS12 |
| Product Dimensions | 12"L x 8"W |
| Style | T,L Square,Square,T Square |
| Style Name | T,L Square,Square,T Square |
| UPC | 853126008265 |

## Product Details

- **Brand:** Mr. Pen
- **Color:** black, white
- **Graduation Range:** 1/16 Inches
- **Material:** Carbon Steel, Metal
- **Style:** T,L Square,Square,T Square

## Images

![Mr. Pen - T Square, T Ruler, 12 inch Metal Ruler, T Square Ruler | Drafting Tools, Architect Ruler, Set Square, Drafting Ruler, Tsquare, Truler, Architectural Triangle, Tee Ruler, L Square - Image 1](https://m.media-amazon.com/images/I/71btiJgn1xL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this be used in making precision markings or is it more for rough cut applications?**
A: I do not feel this is to be considered a precision instrument.  There are small bulges (drips), of paint along various edges that prevent one from being able to accurately draw straight lines or check an item for “square”.

**Q: How thick is this ruler?**
A: The Mr. Pen ruler is about 1/16" inch thick and is made of a good quality metal.  The metal is hard to bend and I personally like it.

**Q: Will this work at a Tshirt vinyl ruler?**
A: I'm not sure I understand your question.

**Q: Is this ruler 1.5" wide?**
A: The top portion is about 1.25 (the "top of the T") the longer part is 1.75" wide. Hope this helps

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice and sturdy
*by G***L on June 20, 2026*

I'm very pleased with the quality of this T square. Very sturdy

### ⭐⭐⭐⭐⭐ It has measurements on both sides. Onecentimeters and inches, and the other side shows.
*by L***A on July 9, 2026*

Excellent product, even better than I expected. The quality is indescribable. Measures on both sides. Ideal for precision in crafts and other projects. 100% recommend. Received on time.

### ⭐⭐⭐⭐⭐ Great for the Price
*by J***E on March 28, 2019*

Getting this T-Square is a solid deal for a cheap price. It does what it's supposed to do by providing 90 angle edges for drawing my architecture plans, sections, and elevations. I normally use a bigger, more expensive, T-Square; I got this T-Square because of it's smaller size that allows me to carry around when I am traveling and unable to go to the studio to work. This T-Square is made out of strong metal, which makes it quite durable, thus allowing it to sustain for a long time. Furthermore, it provides both inch and millimeter measurements, which I found convenient for my drawings. The only minor issue I have with this T-Square is it's thickness, as a thinner edge will make drawing square edges more efficient with better visibility for sophisticated linework. However, the thickness of the T-Square is understandable, as it is made out of sturdy steel, and the thickness doesn't undermine its function. If you are looking for a cheap, small, travel-friendly T-Square, this T-Square is a decent choice.

## Frequently Bought Together

- Mr. Pen - T Square, T Ruler, 12 inch Metal Ruler, T Square Ruler, Drafting Tools, Architect Ruler, Set Square, Drafting Ruler, Tsquare, Truler, Architectural Triangle, Tee Ruler, L Square, Scale Ruler
- Mr. Pen- Carpenter Square, Framing Square, 8 inch x 12 inch , Carpenters Square , Right Angle Ruler, Framing Tools, L Shape Ruler, Metal Square, Steel Square
- anezus Self Healing Sewing Mat, 12inch x 18inch Rotary Cutting Mat Double Sided 5-Ply Craft Cutting Board for Sewing Crafts Hobby Fabric Precision Scrapbooking Project

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**Shop now:** [https://www.desertcart.co.za/products/88733911-mr-pen-t-square-t-ruler-12-inch-metal-ruler](https://www.desertcart.co.za/products/88733911-mr-pen-t-square-t-ruler-12-inch-metal-ruler)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-08-17*