---
product_id: 29421723
title: "Pinnacle 4\" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1\" L x 4\" W, Silver"
brand: "products engineering"
price: "$139.53"
currency: USD
in_stock: true
reviews_count: 3
category: "Products Engineering"
url: https://www.desertcart.us/products/29421723-pinnacle-4-double-square-cast-iron-head-hardened-steel-blade
store_origin: US
region: United States of America
---

# 4" precision blade Hardened steel for durability Cast iron head, precision ground Pinnacle 4" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1" L x 4" W, Silver

**Brand:** products engineering
**Price:** $139.53
**Availability:** ✅ In Stock

## Summary

> 📐 Elevate your craft with precision that commands respect

## Quick Answers

- **What is this?** Pinnacle 4" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1" L x 4" W, Silver by products engineering
- **How much does it cost?** $139.53 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/29421723-pinnacle-4-double-square-cast-iron-head-hardened-steel-blade)

## Best For

- products engineering enthusiasts

## Why This Product

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

## Key Features

- • **Dual-Purpose Design:** Combines engineer’s square precision with combo square adjustability for versatile use
- • **Rock-Solid Durability:** Fully hardened steel blade and precision-ground cast iron head built to last
- • **Effortless Readability:** Satin finish blade reduces glare while etched markings ensure quick, error-free measurements
- • **Micro-Fine Graduations:** Etched & black-filled markings in 8ths, 16ths, and 64ths for unmatched accuracy
- • **Trusted American Craftsmanship:** Proudly made by Woodcraft, a 90+ year leader in premium woodworking tools

## Overview

The Pinnacle 4" Double Square features a fully hardened steel blade with micro-fine etched graduations and a precision-ground cast iron head, delivering professional-grade accuracy and durability for machine setup and joint layout. Designed and manufactured by Woodcraft, this tool blends engineer’s square precision with combo square versatility, making it an essential for serious woodworkers seeking flawless results.

## Description

This 4" double square offers the accuracy of engineer's squares with the adjustability common to larger combination squares. Use this tool for machine and jig set-up or laying out joints. It features a fully hardened and satin finished blade with easy to read, etched and black filled, micro-fine graduations in 8ths, 16ths, and 64ths. The cast iron head is precision ground to federal specification.About Us: Founded in Boston in 1928, Woodcraft's operations were moved to Parkersburg, West Virginia in 1989. It's been over 90 years since Woodcraft first began selling high quality woodworking tools and supplies out of a one room shop in Boston's North End, and Woodcraft is still firmly committed to providing woodworkers with superior products and expert advice. We are America’s leading supplier of saws, hand planes, power tools, hand tools, wood stain and finishes, routers, sanding supplies, wood, wood turning project kits, dust collection, and wood carving tools. We also offer a wide selection of woodworking plans, books and videos. Our family of brands includes WoodRiver, Highpoint, Woodcraft, Pinnacle and Woodcraft Magazine.

Review: Rock solid!!! - Completely 110% worth every penny. Without a doubt if you want the best this is what you need to buy.
Review: like very much - I use this in my wood shop and I use it all the time. It is very handy for most chores on the bench and for squaring up saw blades.

## Features

- For machine and jig set-up or laying out joints
- Fully hardened and satin finished blade
- Precision ground cast iron head
- Feature easy to read, etched and black filled, micro-fine graduations in 8ths, 16ths, and 64ths - 4" double square
- Pinnacle tools are precision-engineered and finely calibrated for the woodworker. Proudly made by Woodcraft, America’s leading supplier of high-quality woodworking hand tools, power tools, domestic and exotic wood, shop supplies, project plans and kits, plus so much more! Offering first-rate products for all your woodworking needs and designed to Help You Make Wood Work. Our family of brands that include Woodcraft, WoodRiver, Highpoint and Woodcraft Magazine.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0037M6EUS |
| Batteries Required? | No |
| Best Sellers Rank | #1,329,785 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,346 in Carpentry Squares |
| Color | silver |
| Customer Reviews | 4.5 4.5 out of 5 stars (7) |
| Date First Available | February 8, 2010 |
| Item Package Quantity | 1 |
| Item Weight | 4.2 ounces |
| Item model number | 7104-404 |
| Manufacturer | Products Engineering Corp |
| Material | Metal |
| Measurement System | Inch |
| Part Number | 7104-404 |
| Product Dimensions | 4.1 x 4.1 x 1.35 inches |
| Style | Square |

## Product Details

- **Brand:** Products Engineering
- **Color:** silver
- **Material:** Metal
- **Product Dimensions:** 4.1"L x 4"W
- **Style:** Square

## Images

![Pinnacle 4" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1" L x 4" W, Silver - Image 1](https://m.media-amazon.com/images/I/71x1RDsjLpL.jpg)
![Pinnacle 4" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1" L x 4" W, Silver - Image 2](https://m.media-amazon.com/images/I/71cguXa4JKL.jpg)
![Pinnacle 4" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1" L x 4" W, Silver - Image 3](https://m.media-amazon.com/images/I/91q+Ok0BeQL.jpg)
![Pinnacle 4" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1" L x 4" W, Silver - Image 4](https://m.media-amazon.com/images/I/81xQeelCA7L.jpg)
![Pinnacle 4" Double Square, Cast Iron Head, Hardened Steel Blade, 4.1" L x 4" W, Silver - Image 5](https://m.media-amazon.com/images/I/91M3L0YJ1hL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Rock solid!!!
*by R***K on May 25, 2023*

Completely 110% worth every penny. Without a doubt if you want the best this is what you need to buy.

### ⭐⭐⭐⭐⭐ like very much
*by D***R on February 12, 2019*

I use this in my wood shop and I use it all the time. It is very handy for most chores on the bench and for squaring up saw blades.

### ⭐ Disappointed by the quality
*by J***L on November 30, 2018*

I bought one of these from my local Woodcraft store. Apparently there was a burr under the thumbscrew. It was VERY difficult to loosen the thumbscrew once it was tightened. I disassembled the square and attempted to remove the burr, but I was unsuccessful. It seemed smooth under the thumbscrew, but still took a tremendous effort to loosen the thumbscrew. I returned the square to Woodcraft and bought the more expensive Starrett double square. Problem solved.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-21*