Grizzly G5726 Combination Square, 12-Inch, 4-Piece This four-piece Combination Square has cast iron square, center heads, and 12" blade with graduations down to 64ths Square head features spirit level and hardened scriber Includes a direct reading double protractor head. Comes in a protective plastic case This four-piece combination square has the same features as the three-piece set but also includes a direct double protractor head A quality product from manufacturer Made in united states