Combination Square Set Number of Pieces 4 Head Type Square Center Protractor Blade Length 12 In Graduation Type 4R Graduations 8ths/16ths/32nds/64ths Head Material Hardened Steel Smooth Black Enamel Finish Blade Material Hardened and Tempered Steel Satin Chrome Blade Finish Features Head has Spirit Level and Hardened Scriber Includes Combination Blade and Heads