is the premier source of tooling, 
parts, and accessories for bench top machinists.  
Contact Us (800) 981 9663
Your Orders
Cart  Cart

On Sale
Value Packs
New Products
All Products
Store Location
Outlet Store

Have you seen?
High Speed Spindle Kit, HiTorque Mini Mill
Most Popular of
Drill Sets
Drill Set, 29 Piece Screw Machine Length HSS
Drill Set, 29 Piece Screw Machine Length HSS
Additional popular items

Machinist's Calculator

Our mobile app; read this with your phone.

Onliine Metals  


Products > Precision > Layout     All Starrett products

Combination Square, 4" 4R, Starrett

         Made in United States
Combination Square, 4" 4R, Starrett
Part Number: 2451
Weight: 0.25 lb

Price: $78.00

In stock
Share this page:

Related Products

Combination Squares
Combination Squares

How-to Video
How-to Video

  • Starrett 4" combination square with square head
  • Starrett catalog number 11H-4-4R
  • Graduation No. 4R- 8ths, 16ths, Quick Reading 32nds, 64ths
  • Machine divided blade


Starrett catalog number 11H-4-4R.

The square has a reversible lock bolt, scriber, spirit level, and hardened steel, photoengraved blade with regular finish. Cast iron head with black wrinkle finish.

The blade is 5/8" wide and 1/16" thick.

Chris' Tips

Chris Chris' Tips
The combination square was invented by Leroy Starrett (yes, that Starrett) in 1877. It's one of those basic tools that should be in every machinist's (and woodworker's) tool box.

Here is some information on using a combination square from Starrett.

We carry several Starrett 12" combination square sets. What's the difference? There are several features that affect the price. One is the protractor head. Squares with a reversible protractor head cost more. Another is the scale. Squares with satin chrome scales cost a little more.


Starrett 4 inch Combination Square


Click here to see the tabs view of this page.


Contact Us / Company Info / Privacy Policy / Warranty / Terms & Conditions / Payment Options / Shipping Rates & Policies
Copyright © 2007-2020
Phone: (800) 981-9663