---
product_id: 216984001
title: "Mr. Pen Triangle Ruler, Protractor, Math Set - 3 Pack, Square Ruler, Protractor for Geometry"
brand: "mr. pen"
price: "C$921"
currency: NIO
in_stock: true
reviews_count: 11
category: "Mr. Pen"
url: https://www.desertcart.ni/products/216984001-mr-pen-triangle-ruler-protractor-math-set-3-pack-square
store_origin: NI
region: Nicaragua
---

# 12-inch precision ruler protractor with center cutout 45° & 30/60° set squares Mr. Pen Triangle Ruler, Protractor, Math Set - 3 Pack, Square Ruler, Protractor for Geometry

**Brand:** mr. pen
**Price:** C$921
**Availability:** ✅ In Stock

## Summary

> 📐 Master your angles, own your projects.

## Quick Answers

- **What is this?** Mr. Pen Triangle Ruler, Protractor, Math Set - 3 Pack, Square Ruler, Protractor for Geometry by mr. pen
- **How much does it cost?** C$921 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/216984001-mr-pen-triangle-ruler-protractor-math-set-3-pack-square)

## 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 & Impress:** High-quality, sturdy materials ensure durability through every project deadline.
- • **Precision Meets Clarity:** Transparent design with etched inch & cm scales for flawless measurements every time.
- • **Elevate Your Workspace Vibe:** Join thousands of top-tier students and pros who trust Mr. Pen for their precision needs.
- • **Versatile Geometry Powerhouse:** Includes straight ruler, dual set squares, and protractor—perfect for architects, engineers, and creatives.
- • **Designed for Focused Professionals:** Clear large triangles and center cutout protractor enhance accuracy and ease of use.

## Overview

This 3-piece geometry set from Mr. Pen includes a 12-inch straight ruler, 45° and 30/60° set squares, and a protractor with a center cutout. Crafted from transparent, durable material with etched inch and centimeter markings, it offers precise measurements and excellent visibility. Ideal for professionals and students in architecture, engineering, design, and education, this high-quality math tool set combines functionality with lasting reliability.

## Description

desertcart.com : Mr. Pen Triangle Ruler, Protractor, Math Set - 3 Pack, Square Ruler, Protractor for Geometry : Office Products

Review: Outstanding product and service. - This is the 2nd triangle set that I ordered for my son who is studying Mechanical engineering. The first set was too large for his project. I kept it for future use. This set was really nice. I really love the quality and value you get with Mr Pen. I will always buy from this company over any other. They always send a thank you card and the cutest little black mustache with your order. My son will love that touch. This little gesture will bring a bit of happiness for him during his stressful studies. It matters. Thank you to Mr Pen Company for you outstanding service and product. These measuring instruments are really nice and will help him greatly.
Review: great product - good buy

## Features

- Package Includes: One 12-Inch Straight Ruler, One 45 Degree Set Square, And One 30/60 Set Square
- Etched With Easy To Read Inch And Centimeter Measurements
- Transparent Color For Better Visibility
- Large Clear Triangles, High Quality And Sturdy, Protractor Center Cut Out
- Wide Application: Math Geometry Tool Set Are Useful Tools For Architects, Engineers, Artists, Designers, Students And Teachers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0885RD8KN |
| Best Sellers Rank | #12,447 in Office Products ( See Top 100 in Office Products ) #27 in Drafting Tools & Drafting Kits |
| Date First Available | May 6, 2020 |
| Item Weight | 3.2 ounces |
| Manufacturer | Mr. Pen |
| Product Dimensions | 12 x 12 x 0.04 inches |

## Product Details

- **Brand:** Mr. Pen
- **Color:** Transparent
- **Graduation Range:** 1/16 Inches
- **Material:** Plastic
- **Style:** Triangle ruler

## Images

![Mr. Pen Triangle Ruler, Protractor, Math Set - 3 Pack, Square Ruler, Protractor for Geometry - Image 1](https://m.media-amazon.com/images/I/81IHani6ljL.jpg)

## Available Options

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

## Questions & Answers

**Q: Are these flexible?**
A: Unfortunately, no they are not.

**Q: what  size it the set square?**
A: Its right there.

**Q: where is the hole to place on the vortex to measure the angle?**
A: SUSANLEE, 
THERE ISN'T ONE. 
ALSO, THIS SET AND I'VE HAD TWO REPLACEMENTS SINCE THE ORIGINAL PURCHASE ARE DEFECTIVE. I FOUND ALL MEASURMENTS ON EVERY PIECE ARE OFF BY A CONSIDERABLE AMOUNT. I MEASURED THEM AGAINST THREE DIFFERENT RULERS AND EVERY ONE WAS OFF. ADDITIONALLY, THE MEASURMENT MARKS ARE SO FAINT I CAN BARELY SEE THEM EVEN AGAINST BLEACH WHITE PAPER. DON'T WASTE YOUR MONEY.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Outstanding product and service.
*by J***E on October 7, 2025*

This is the 2nd triangle set that I ordered for my son who is studying Mechanical engineering. The first set was too large for his project. I kept it for future use. This set was really nice. I really love the quality and value you get with Mr Pen. I will always buy from this company over any other. They always send a thank you card and the cutest little black mustache with your order. My son will love that touch. This little gesture will bring a bit of happiness for him during his stressful studies. It matters. Thank you to Mr Pen Company for you outstanding service and product. These measuring instruments are really nice and will help him greatly.

### ⭐⭐⭐⭐⭐ great product
*by D***S on November 27, 2025*

good buy

### ⭐⭐⭐⭐ Too small
*by S***N on April 27, 2025*

I bought this because I want to draw right angles on grid paper. Being an American, I thought 17x11 meant inches, non cm. If I had read the specs better, I would have seen they are not that big. My fault; I wanted something that cover an 8 1/2 by 11 inch paper. Because they were less than $5 I didn't do much research. I also wanted to be able to bump a ruler next to it to draw a line, but they are so thin that a good ruler with cork backing is too tall to do that. Again my fault, but if that is what you need, spend a few $$ more.

## Frequently Bought Together

- Mr. Pen Triangle Ruler, Protractor, Math Set - 3 Pack, Square Ruler, Protractor for School Geometry
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**Shop now:** [https://www.desertcart.ni/products/216984001-mr-pen-triangle-ruler-protractor-math-set-3-pack-square](https://www.desertcart.ni/products/216984001-mr-pen-triangle-ruler-protractor-math-set-3-pack-square)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-03-12*