13MC Millimeter Reading Double Square

13, 13M Double Squares with Hardened Blades
Reading Double Square, mm, 150mm

Starrett 13 squares are very popular with machinists, toolmakers, and patternmakers. The sliding blades are adjustable making it practical for a wide variety of uses. The faces of the head are ground square. 150mm with Graduated Blade square.

Contact Starrett


  • With Graduated Blade Only
  • Level Vial on base.
  • mm Grads Both Edges One Side; mm and 1/2mm Reverse Side
  • Double Square with hardened blade


  • Made in America: Yes
  • Type: Double Square with hardened blade
  • Blade Length (mm): 150mm
  • Graduations: mm - 1/2mm
  • Material: Steel
  • Includes: With Graduated Blade Only


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    California Proposition 65 Warning

      WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov