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Internet #100356502

Model #E250

Store SKU #677051

12 in. Combination Square

  • BLADE-LOCK for fast adjustment and secure hold
  • Precision Machined Head with Rational Dimensions
  • DUAL-PITCH Vial for checking level, 1 and 2 degree slope
  • See More Details

Frequently Bought Together


Product Overview

True Blue Combination Square
Blade Lock
Dual Pitch Vial
Rational Head
Milled Edge
Stainless Steel Blade
Cast Zinc Head
1-Year Warranty
The Empire 12 in. TRUE BLUE Combination Square (e250) features precision machined working surfaces and a head with rational dimensions for a quick check of common measurements. The square features the BLADE-LOCK self-aligning drawbolt which allows users to make quick adjustments with a secure hold. The DUAL-PITCH TRUE BLUE Vial allows users to easily check level, one-, and two-degree slope. The 12 in. etched stainless steel blade will not fade over time and features high-visibility markings. The combo square also features onboard storage for a hardened scriber.
  • BLADE-LOCK for fast adjustment and secure hold
  • Precision machined working surfaces
  • DUAL-PITCH Vial for checking 1 and 2 degree slope
  • Rational head dimensions
  • Cast Zinc head
  • Stainless steel blade
  • Scriber
  • High visibility markings
  • Limited life time warranty
  • Includes: (1) E250 12 in. Heavy Duty Professional Combination Square w/ TRUE BLUE Vial
  • Note: product may vary by store

Info & Guides

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True Blue Combination Square
Blade Lock
Dual Pitch Vial
Rational Head
Milled Edge
Stainless Steel Blade
Cast Zinc Head
1-Year Warranty



Product Depth (in.)
Product Height (in.)
Product Width (in.)


Angle capacity (degrees)
No Additional Features
Graduations / Resolution
Hand Tool Type
Package Quantity
Square Length
12 in.
Square Type
Combination Square
Tools Product Type
Hand Tool

Warranty / Certifications

Manufacturer Warranty
Product is warranteed on a manufacturer's defect.

Questions & Answers


What is this made from, stainless or aluminium?

Asked by Mopher August 1, 2020

I'm not certain, but by it's weight I'd guess it's stainless.

What’s the accuracy tolerance between the blade and the square.

Asked by Dave January 21, 2020

This square will be close to 90 degrees for sure. It also is worth mentioning that it is more of a layout tool than precision tool. Yes it is a great tool but because it is adjustable that gives room for error. If you are looking for more precision than I would go with a fixed square. I would still highly recommend this tool!

How does this perform when using as a straight edge for cutting 1” lunber with a jigsaw? Is there enough edge for the shoe to rest against?

Asked by Shawn May 31, 2019

I would say you have not enough surface to use it as a straight edge.

Blade install

Asked by jdc January 12, 2019

There is a groove on one side of the ruler that lines up with a tab on the pressure tension knob. In addition, if you gently press down on the pressure tension knob it will allow the ruler to slide back and forth a little easier.

What material is the blue body made out of? Cast iron? Die cast aluminum? or die cast zinc (aka ...

Asked by RobC July 24, 2017

The blue body is made of cast zinc and the blade is made of stainless steel. Both great metals and will last more than a lifetime if taken care of.

Does it have the metric scale on the other side of the ruler?

Asked by Carolina December 14, 2016

My combination square does not have a metric scale

Customer Reviews

  • 4.7
    out of 474 reviews
  • 93% recommend this product
Filter by:
Showing 1-10 of 474 reviews
Used to ensure a squared muzzle.
Used to ensure a squared muzzle.
by Doc
Most fun you'll have with a square, most versitile and...
Most fun you'll have with a square, most versitile and useful in my collection.
by Rhyder
Good product
Good product
by Paco
The Empire combination square has been a handy addition to my inventory of tools. I've used rece...
The Empire combination square has been a handy addition to my inventory of tools. I've used recently in a garage project. Measurements are easy to see whether in 8th or 16th increments. Slides easy. No problems over the 30 days I've had it. Nice go-to tool.
by Eric
2 people found this helpful
Great Square
Very easy to use. Great quality for the price. Would highly recommend.
by Daniel
This is serious tool
It definitely replaces my PVC square purchased as a “quickie” some time ago. This square is heavy duty tool, strong, precise and very well made. I have little objection to sharper edges on measuring scale. I would suggest wearing gloves. I love presence of water level, which is great for brief checking, so you don’t need to reach constantly after other water level. This tool is very easy to use for 45 degr. cut mark-up. Chances of use are increased by possibility of sliding the scale in main body of square. The measuring scale has reading on both sides the same (no metric involved).
by MECzech
2 people found this helpful
Robust tool made in America
No only is this not made in China, for a change, it is actually made in Wisconsin, the state next to me. Also the company has a female president which is kind of cool. The combination square is solidly made so hopefully it will last a long time. There was a small thumb screw on the bottom that I thought was some kind of adjustment and the info that came with it said nothing about it. It turns out that you just pull it out and it is a pointy thing for marking stuff. Duh! The only negative thing with it is that the ruler part looked a little scratched up. Nothing major and once I start using it I'm sure I won't notice it. The square also has a spirit level built in which is a nice extra.
by Baz
3 people found this helpful
Upgrade :)
I just had no idea that such a simple tool upgrade could make such a difference. Having broken my previous combo I went for a sturdier option and this one definitely is a great choice. Angles are correct. There is no wobble. The slide is easy and tightens well. The level is easy to view unless you are looking at very dark surfaces, not as easy as yellow liquid but great in daylight/lighter working surfaces. Having a scribe pin included with out of the way storage is very handy.
by donluc8
4 people found this helpful
Poor machining
Not a good quality combination square. The whole thing needs burrs removed and the square surfaces are machined poorly. A precision tool like this should have a good machine finish and this one is rough and wavy. The 12" rule looks good except for the burrs.
by PaulCoMat
10 people found this helpful
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Showing 1-10 of 474 reviews