---
product_id: 5146435
title: "Steel Combination Square with Square Head - 12\" Blade Length, Cast Iron Heads, Reversible Lock Bolt, Scriber, Spirit Level, 4R Graduation Type - 11H-12-4R"
brand: "starrett"
price: "HK$1624"
currency: HKD
in_stock: true
reviews_count: 13
category: "Starrett"
url: https://www.desertcart.hk/products/5146435-steel-combination-square-with-square-head-12-blade-length-cast
store_origin: HK
region: Hong Kong
---

# 12" hardened steel blade for precision Reversible lock bolt for secure adjustments Cast iron heads for durability Steel Combination Square with Square Head - 12" Blade Length, Cast Iron Heads, Reversible Lock Bolt, Scriber, Spirit Level, 4R Graduation Type - 11H-12-4R

**Brand:** starrett
**Price:** HK$1624
**Availability:** ✅ In Stock

## Summary

> 📐 Own the benchmark of precision — because your craft deserves nothing less.

## Quick Answers

- **What is this?** Steel Combination Square with Square Head - 12" Blade Length, Cast Iron Heads, Reversible Lock Bolt, Scriber, Spirit Level, 4R Graduation Type - 11H-12-4R by starrett
- **How much does it cost?** HK$1624 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/5146435-steel-combination-square-with-square-head-12-blade-length-cast)

## Best For

- starrett enthusiasts

## Why This Product

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

## Key Features

- • **Legacy Quality:** Trusted by pros and DIYers alike, this heirloom-grade square guarantees lifetime reliability.
- • **Built to Endure:** Rugged cast iron heads and alloy steel blade withstand harsh job site conditions and daily wear.
- • **Precision Redefined:** 4R graduation with 1/64" increments ensures ultra-accurate measurements every time.
- • **Effortless Adjustments:** Reversible lock bolt and smooth thumbwheel let you set and secure measurements with one hand.
- • **Multi-Functional Mastery:** From squaring and mitering to depth gauging and leveling, this tool adapts to every project need.

## Overview

The Starrett Steel Combination Square features a 12-inch hardened steel blade with 4R graduations for precise measurements down to 1/64 inch. Equipped with durable cast iron heads, a reversible lock bolt, and an integrated spirit level and scriber, it offers versatile functionality for carpenters, mechanics, and DIY professionals. Engineered for longevity and accuracy, this tool is a trusted standard for flawless layout and measurement tasks.

## Description

Starrett Steel Combination Square with Square Head - 12" Blade Length, Cast Iron Heads, Reversible Lock Bolt, Scriber, Spirit Level, 4R Graduation Type - 11H-12-4R: Carpentry Squares: desertcart.com: Tools & Home Improvement

Review: An amazingly useful tool of heirloom quality - Starrett's 6" inch combination square is regarded by many as a the best on the market. I haven't evaluated any of the other high end squares, but to my mind it is nearly flawless. Why do I think this? It is square, not kinda' sorta' square if you hold it right. I mean square to the point where you can't detect any light between a machinist's reference block and the body or blade even with strong backlighting. Your eye can see light from a 0.001" opening so you know the square is at least this square. You can tighten the thumbwheel using only one hand to achieve the squareness described above. The numbers and lines are engraved so they don't wear off. The engravings are deep enough so that you can put the points of your dividers in them to accurately set the distance between the points. The satin finish on the blade makes it easy to read. The "4R" marking system (1/8, 1/16, 1/32 and 1/64) is more useful than you might realize. It cuts down errors due to misreading the scale and is faster. Reinserting the blade after removing it from the body is easy. On some squares, this is a major hassle. On the Starrett, the protrusion in the body which holds the blade generally stays in place when you remove the blade. If it gets misaligned with the slot, it is easy to rotate it back to parallel with the body so you can reinsert the blade. The spring holding the protrusion has the proper amount of stiffness. Another good thing is that it is rugged. I haven't hit it with a hammer or put a torch to it, but it has suffered a lot of drops onto a wooden floor without damage. Why don't I think it is perfect? It will rust (like almost all steel) if you don't take care of it. By taking care of it I mean storing it dry, free of salt from sweat, and dust. Not a big deal, but this is a precision square so treat it with the care it deserves. A wise man once said, "When you buy quality, you only cry once." Do yourself a favor and buy this square.
Review: The foundation for all clean, accurate work - In science, one is quickly taught that errors accumulate geometrically, not linearly. So perhaps that is why I felt no buyers remorse in paying the price for a proper Starret square. I now have the confidence that when I strike a line or square an edge, it is true every time. I dumped all my crummy Stanley squares (not before measuring them against the Starret and finding all of them out of square by some degree and with imprecise straight edges) and now, all of a sudden, my marks all line up when I strike lines for through-mortises. Starret IS precision. Everything about it is finely finished, perfectly engineered, and beautiful. It feels heavy and as solid as a block of granite in the hands. There is no slip, no jiggle. The grade marks are impressed and deeply embossed, easy to read, fine and accurate. The forged body and rule came polished and satin, respectively, and no touch of rust, pitting, or scratching has showed up after weeks of daily use, and a few hard falls onto an oak deck that had my heart pounding- until I realized just how bullet-proof an all-forged Starret really is. For the beginner woodworker, spending 100+ on a ruler seems.. prohibitive. Foolish. Surely a 25 dollar Stanley can do the job? Well, I don't think it can. You can make a straight cut with a 20 dollar saw, and plane smooth with a 15 dollar yard-sale Stanley 4- but not if your measures are off. A good Starret is the foundation for all clean, accurate work, the only way to confirm your planes are flat, your chisels are square, and your stock is jointed proper. Save money any way you can- but not on the one tool that everything else in your shop is measured against.

## Features

- Designed for Precision - The ruler has a 4R graduation type with 8ths, 16ths, quick reading 32nds, and 64ths that greatly increase the accuracy of your measurements.
- Built to Last - Able to withstand even the harshest environments as our combination squares are designed to last a lifetime. They are very reliable and perfect for any project you take on.
- Variety of Uses - The square head can be used for a variety of purposes such as scribing right angles and parallel lines, measuring, tri-squaring, mitering, depth gauging, height gauging, and levelling.
- Quality Made - The blade is made of hardened steel, offering exceptional durability and resistance to wear, rough usage, high-impact pressure, and shock.
- Versatile Layout Tool - Starrett squares are offered in a practical variety of styles to suit the needs of the individual, whether it be a toolmaker, mechanic, carpenter, or a "do-it-yourself" homeowner.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002CSBNO |
| Best Sellers Rank | #37,822 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #33 in Carpentry Squares |
| Brand | Starrett |
| Brand Name | Starrett |
| Color | Multicolor |
| Customer Reviews | 4.7 out of 5 stars 2,490 Reviews |
| Global Trade Identification Number | 00049659500554, 00094705119709 |
| Graduation Range | 1/64 Inches |
| Item Dimensions L x W | 12"L x 1"W |
| Item Weight | 1.22 Pounds |
| Manufacturer | Starrett |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model | 11H-12-4R |
| Part Number | 11H-12-4R |
| Product Dimensions | 12"L x 1"W |
| Style | 4R Graduation Type |
| Style Name | 4R Graduation Type |
| UPC | 094705119709 049659500554 |
| Unit Count | 1.0 Count |
| Warranty Description | One Year on defects in material and workmanship |

## Product Details

- **Brand:** Starrett
- **Color:** Multicolor
- **Graduation Range:** 1/64 Inches
- **Material:** Alloy Steel
- **Style:** 4R Graduation Type

## Images

![Steel Combination Square with Square Head - 12" Blade Length, Cast Iron Heads, Reversible Lock Bolt, Scriber, Spirit Level, 4R Graduation Type - 11H-12-4R - Image 1](https://m.media-amazon.com/images/I/61tHgdkq+PL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ An amazingly useful tool of heirloom quality
*by C***S on March 12, 2012*

Starrett's 6" inch combination square is regarded by many as a the best on the market. I haven't evaluated any of the other high end squares, but to my mind it is nearly flawless. Why do I think this? It is square, not kinda' sorta' square if you hold it right. I mean square to the point where you can't detect any light between a machinist's reference block and the body or blade even with strong backlighting. Your eye can see light from a 0.001" opening so you know the square is at least this square. You can tighten the thumbwheel using only one hand to achieve the squareness described above. The numbers and lines are engraved so they don't wear off. The engravings are deep enough so that you can put the points of your dividers in them to accurately set the distance between the points. The satin finish on the blade makes it easy to read. The "4R" marking system (1/8, 1/16, 1/32 and 1/64) is more useful than you might realize. It cuts down errors due to misreading the scale and is faster. Reinserting the blade after removing it from the body is easy. On some squares, this is a major hassle. On the Starrett, the protrusion in the body which holds the blade generally stays in place when you remove the blade. If it gets misaligned with the slot, it is easy to rotate it back to parallel with the body so you can reinsert the blade. The spring holding the protrusion has the proper amount of stiffness. Another good thing is that it is rugged. I haven't hit it with a hammer or put a torch to it, but it has suffered a lot of drops onto a wooden floor without damage. Why don't I think it is perfect? It will rust (like almost all steel) if you don't take care of it. By taking care of it I mean storing it dry, free of salt from sweat, and dust. Not a big deal, but this is a precision square so treat it with the care it deserves. A wise man once said, "When you buy quality, you only cry once." Do yourself a favor and buy this square.

### ⭐⭐⭐⭐⭐ The foundation for all clean, accurate work
*by 3***H on January 15, 2017*

In science, one is quickly taught that errors accumulate geometrically, not linearly. So perhaps that is why I felt no buyers remorse in paying the price for a proper Starret square. I now have the confidence that when I strike a line or square an edge, it is true every time. I dumped all my crummy Stanley squares (not before measuring them against the Starret and finding all of them out of square by some degree and with imprecise straight edges) and now, all of a sudden, my marks all line up when I strike lines for through-mortises. Starret IS precision. Everything about it is finely finished, perfectly engineered, and beautiful. It feels heavy and as solid as a block of granite in the hands. There is no slip, no jiggle. The grade marks are impressed and deeply embossed, easy to read, fine and accurate. The forged body and rule came polished and satin, respectively, and no touch of rust, pitting, or scratching has showed up after weeks of daily use, and a few hard falls onto an oak deck that had my heart pounding- until I realized just how bullet-proof an all-forged Starret really is. For the beginner woodworker, spending 100+ on a ruler seems.. prohibitive. Foolish. Surely a 25 dollar Stanley can do the job? Well, I don't think it can. You can make a straight cut with a 20 dollar saw, and plane smooth with a 15 dollar yard-sale Stanley 4- but not if your measures are off. A good Starret is the foundation for all clean, accurate work, the only way to confirm your planes are flat, your chisels are square, and your stock is jointed proper. Save money any way you can- but not on the one tool that everything else in your shop is measured against.

### ⭐⭐⭐⭐⭐ Perfection!
*by O***S on May 13, 2026*

Perfection. Expensive, but so worth it!

## Frequently Bought Together

- Starrett Steel Combination Square with Square Head - 12" Blade Length, Cast Iron Heads, Reversible Lock Bolt, Scriber, Spirit Level, 4R Graduation Type - 11H-12-4R
- Starrett 6-Inch Spring-Tempered Steel Rule with Inch Graduations - Ideal for Metalworking and Engineering - Satin Chrome Finish, 4R Graduations, 3/64-Inch Thickness - C604RE-6

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-07-14*