Combination Square Set Number of Pieces 4 Head Type Square Center Protractor Blade Length 12 In Graduation Type 35 Graduations mm and 1/2mm Head Material Forged Steel Black Baked Enamal Finish Blade Material Steel Satin Chrome Blade Finish Features Blade Hardened and Tempered with Machine Divided Graduations Protractor Head w/Level Includes Combination Blade and Heads