C33H-4-4R 4" Combination Square with Square Head 56390

33H and HC Combination Squares with Forged and Hardened Steel Heads and with Smooth Black Enamel Finish
Steel Combination Square, Inch, 4"

The Starrett 4" Combination Square with Square Head includes a reversible lock bolt, and hardened steel, photo-engraved blade with satin chrome finish. The square heads are forged hardened steel with smooth, black enamel finish. 4", 4R Grad, Satin Chrome Blade.

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  • Reversible lock bolt
  • Hardened steel, photo-engraved blade
  • Satin Chrome Finish Blade
  • Forged and Hardened Steel Heads with Smooth Black Enamel Finish


  • Made in America: Yes
  • Blade Length (in): 4"
  • Blade Finish: Satin Chrome
  • 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


    Combination Square Guide (Form 955)

    Document stating the introduction, assembly, and tips on the Combination Square

    Catalog 33 - Section 11 - Squares

    Invented by our founder, the combination square was our first product and today, our brand is considered to be the best available. This section offers a range of high quality solid squares, tri-squares specialty products and accessories that is especially broad and deep.

    Precision Hand Tools (Catalog 33)

    612 page catalog featuring precision hand tool, force measurement, vison systems, optical comparators, laser measurement, and flat stock.

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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