Double Square, 6" 4R, StarrettMade in United States

Double Square, 6" 4R, Starrett
  • Starrett 6" double square with graduated blade
  • 4R Graduation – 8ths, 16ths, 32nds, 64ths
  • Popular with machinists, toolmakers, and patternmakers
  • The head is approximately 3-1/2" (90 mm) long
  • The faces are approximately 9/16" (14 mm) wide
Part Number: 2025
Weight: 0.60 lb

Price: $111.00

In stock
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The sliding blades are adjustable making it more practical for a wide variety of uses than a common square with fixed blade. The faces of the head are ground square, and the 6" (150 mm) size has a level.

The beveled blade and the drill grinding blade shown at the bottom of the photo are not included with this product.

Starrett catalog number 13C.

Chris Chris' Tips
When using a precision rule for very close accuracy, the eye can read better by measuring between two lines than from the end of the rule to a line.  

Here is how to use a steel rule.

Warning Icon WARNING: This product can expose you to lead, which is known to the State of California to cause cancer and/or reproductive harm. For more information go to