There is a newer version of this product available

33H-12-4R 12" Combination Square with Square Head

33H and HC Combination Squares with Forged and Hardened Steel Heads and with Smooth Black Enamel Finish
Steel Combination Square, Inch, 12"

The Starrett 12" Combination Square with Square Head has the same features as the 11 Series except that the square heads are forged hardened steel with smooth, black enamel finish. 12", 4R Grad, Regular Blade

This item is discontinued. Please consider the recommended alternative listed above or contact our special order department at (978) 249-3551 x410 for more information.

Contact Starrett



  • Reversible lock bolt, scriber, spirit level
  • Hardened steel, machine divided blade
  • Regular Finish Blade
  • Forged and Hardened Steel Heads with Smooth Black Enamel Finish


  • Blade Length (in): 12"
  • Blade Finish: Regular
  • Graduation Type: 4R
  • Graduations: 8ths, 16ths, Quick Reading 32nds, 64ths
  • Head Finish: Smooth Black
  • Head Material: Forged Steel
  • Head Types: Square
  • Number of Pieces: 2


3D CAD Files / Exploded Parts Diagram

    Login to see related product files. Or create an account.

Product Testimonials

    Write a product review


      Member of Kit
      Item #DescriptionPart No.QtyInformation
      30•VIAL, .281X1 5/1613263-01
      40•SPRING, .260X.310X.563X.025X501086-01
      50•BUSHING, AWL #11-601087-1/21
      60•PLUG, EXPANSION17816-01
      80•BOLT, LOCK #11-1222658-01
      90•NUT, .231-2801083-01
      110•AWL SUB ASSEMBLY07659-C1
      120BLADE, #4 GRADB12-4R1

    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: