Double Square, 4" 4R, Starrett

Starrett 4" double square with graduated blade
4R Graduation – 8ths, 16ths, 32nds, 64ths
Popular with machinists, toolmakers, and patternmakers

Part Number: 3559
Weight: 0.23 lb

Price: $96.00

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Description
Chris' Tips

The sliding blade is 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.

Starrett catalog number 13A.

Chris' Tips

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.