C623R-6 6" Steel Rule with Letter and Number Drill Sizes, Graduations at Quick-reading 32nds and 64ths 56661

The Starrett 6" Steel Rule with Letter and Number Drill Size features a satin chrome finish. Graduations at quick-reading 32nds and 64ths. 6", 10R Grad with Letter and Number Drill Sizes 64ths.

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  • Spring-Tempered
  • Satin chrome finish
  • Quick Reading
  • Accurate, machine-divided, distinctive graduations


  • Length (in): 6"
  • Graduation Type: 10R
  • Graduations: Quick-Reading 32nds and 64ths
  • Finish: Satin Chrome
  • Construction: Spring-Tempered Steel
  • Thickness (in): 3/64"
  • Width (in): 3/4"


  • 1634 (55434)
    1634 Case with Clip for 3/4" (19mm) Wide Rules


    2D Dimensional Drawing (PDF)



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