---
product_id: 16045861
title: "Johnson Level & Tool 400EM-S Heavy Duty Professional Inch/Metric Metal Combination Square, 12\", Silver, 1 Square"
brand: "johnson"
price: "₨13302"
currency: LKR
in_stock: true
reviews_count: 8
category: "Johnson"
url: https://www.desertcart.lk/products/16045861-johnson-level-and-tool-400em-s-heavy-duty-professional-inch
store_origin: LK
region: Sri Lanka
---

# 12" stainless steel blade with dual graduations Auto-Lock blade assembly for exact alignment CNC machined square head for precision Johnson Level & Tool 400EM-S Heavy Duty Professional Inch/Metric Metal Combination Square, 12", Silver, 1 Square

**Brand:** johnson
**Price:** ₨13302
**Availability:** ✅ In Stock

## Summary

> 📐 Elevate your craft with precision that won’t quit—because your projects deserve the best.

## Quick Answers

- **What is this?** Johnson Level & Tool 400EM-S Heavy Duty Professional Inch/Metric Metal Combination Square, 12", Silver, 1 Square by johnson
- **How much does it cost?** ₨13302 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/16045861-johnson-level-and-tool-400em-s-heavy-duty-professional-inch)

## Best For

- johnson enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Heavy-duty cast zinc head with chip-resistant black e-coating stands up to the toughest job sites.
- • **Multi-Tool Mastery:** Functions as a machinist’s square, try square, miter square, marking gauge, depth gauge, and level—one tool, endless possibilities.
- • **Precision Perfected:** CNC-machined square head guarantees flawless 45° & 90° angles every time.
- • **Dual-Scale Dominance:** Permanently etched imperial and metric graduations ensure lifetime readability—no fading, no guessing.
- • **Lock & Load Accuracy:** Auto-Lock blade assembly secures your measurements for consistent, repeatable results.

## Overview

The Johnson 400EM-S 12" Combination Square is engineered for professionals who demand accuracy and durability. Featuring a CNC-machined cast zinc head, a stainless steel blade with permanently etched dual graduations, and an Auto-Lock blade assembly, this tool delivers precise 45° and 90° measurements, miter cuts, depth readings, and leveling. Built tough with a chip-resistant finish and a hardened scriber, it’s the ultimate all-in-one measuring companion for serious craftsmen.

## Description

Product Description Little tool, big results. Johnson's easy to use 12" metal combination square gives you the accuracy and precision you need for every job. Its stainless steel blade has english graduations of 1/8", 1/16" and 1/32" as well as metric graduations that are permanently etched in black for easy readability. It features a durable acrylic vial, heavy-duty cast zinc head with a black, chip-resistant e-coating finish, and hardened screw-in scriber that won't fall out so that this combo square can withstand even the roughest job site abuse. It was also designed with maximum accuracy in mind - its square head is CNC machined for greater accuracy, and the Auto-Lock™ blade assembly makes it easier to accurately line up your tool for use. From the Manufacturer Cast zinc head with computer-machined gauging edges for greater accuracy. Acrylic yellow barrel vial. Hardened, removable scriber. Steel blade with protective anti-rust coating is permanently stamped in 1/8ths, 1/16ths, and 1/32nds.

Review: Love this combination square! - Love that is stainless steel so it won’t corrode in humid Florida, love that the numbers are etched and won’t rub off, love how it’s a very solid hunk off metal and not some plastic Tonka Toy piece of junk, love how it has both inches and metric, and love how my table saw blade is finally square!! And all at a reasonable price. This is the one to have!
Review: Really a great value. - I am not a tool snob, but I do like quality tools. I already have a really nice PEC square that is built/rated to very high specifications. I thought I would buy this just to have around when I needed something for measuring lumber (2 X 4 ) without breaking out my really nice square. When I opened the package I was really impressed with the weight of this tool. It does not feel like a cheaply made tool at all. Then I did the test where you take the square - draw a line about the length of the square, then turn it around and duplicate the line. To my surprise this square is every bit as square as my PEC! If you are new to woodworking, I would suggest picking this square up. I am going to treat this tool as if it cost me 100 bucks just because it is so well made. I wish all low cost tools were of this caliber of quality.

## Features

- COMBO SQUARE: This Johnson combination square was designed with maximum accuracy in mind - its square head is CNC machined for greater accuracy.
- STAINLESS BLADE: This combination square has a stainless steel blade with etched graduations in 1/8", 1/16", and 1/32"; as well as millimeter graduations that are permanently imprinted so they will never fade or degrade
- ACCURATE MEASUREMENTS: Auto-Lock blade assembly ensures precise alignment for optimal tool performance
- APPLICATIONS: Ideal machinist's square; straightedge; adjustable try square; miter square; marking gauge; and depth gauge
- PRODUCT SPECIFICATIONS: Accurately measure 45° and 90°, mark miter cuts and find depth as well as simple distance measurements. Built-in level vial for checking level and plumb

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Johnson |
| Color | Black |
| Graduation Range | 1/32 Inches |
| Material | Stainless Steel , Zinc |
| Product Dimensions | 12"L x 5.5"W |
| Style | 420EM Inch/Metric Metal |

## Product Details

- **Material:** Stainless Steel, Zinc
- **Brand:** Johnson
- **Color:** Black
- **Style:** 420EM Inch/Metric Metal
- **Graduation Range:** 1/32 Inches

## Images

![Johnson Level & Tool 400EM-S Heavy Duty Professional Inch/Metric Metal Combination Square, 12", Silver, 1 Square - Image 1](https://m.media-amazon.com/images/I/51C3F6pxAaL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love this combination square!
*by J***A on March 2, 2025*

Love that is stainless steel so it won’t corrode in humid Florida, love that the numbers are etched and won’t rub off, love how it’s a very solid hunk off metal and not some plastic Tonka Toy piece of junk, love how it has both inches and metric, and love how my table saw blade is finally square!! And all at a reasonable price. This is the one to have!

### ⭐⭐⭐⭐⭐ Really a great value.
*by G***Z on May 7, 2020*

I am not a tool snob, but I do like quality tools. I already have a really nice PEC square that is built/rated to very high specifications. I thought I would buy this just to have around when I needed something for measuring lumber (2 X 4 ) without breaking out my really nice square. When I opened the package I was really impressed with the weight of this tool. It does not feel like a cheaply made tool at all. Then I did the test where you take the square - draw a line about the length of the square, then turn it around and duplicate the line. To my surprise this square is every bit as square as my PEC! If you are new to woodworking, I would suggest picking this square up. I am going to treat this tool as if it cost me 100 bucks just because it is so well made. I wish all low cost tools were of this caliber of quality.

### ⭐⭐⭐⭐ Could be better, but better than any other metric version on Amazon.
*by S***B on October 31, 2020*

I really needed a metric version of this tool and originally all I could find were these horrible green ones that came in Chinese packaging. They were sharp and damaged all over. Compared to those this one is golden. It still seems a little rough around the edges, but is much better quality, and the machining is smooth. There is still the occasional small gouging, but it is finished over and not sharp to the touch. The locking mechanism is very cheap though. It really drives down the quality of this tool. The ruler also has edging issues where it is finished to much casuing the lines to have been worn off.

## Frequently Bought Together

- Johnson Level & Tool 400EM-S Heavy Duty Professional Inch/Metric Metal Combination Square, 12", Silver, 1 Square
- Johnson Level & Tool 406EM Professional Inch/Metric Combination Square, 6", Silver, 1 Square
- IRWIN Tools Combination Square, Metal-Body, 6-Inch (1794468), Blue

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-25*