Combination Square Set Number of Pieces 3 Head Type Square Center Blade Length 12 In Graduation Type 4R Graduations 8ths/16ths/32nds/64ths Head Material Hardened Cast Iron Black Baked Enamel Finish Blade Material Steel Satin Chrome Blade Finish Features Tempered w/Microfine Graduations Includes Combination Blade Center and Square Heads