Combination Square Set Number of Pieces 4 Blade Finish Satin Blade Material Steel Blade Length 12 in Graduation Marks - Front 1/64 in Head Type Center/Non-Reversible Protractor/Square System of Measurement SAE Head Material Cast Iron Includes Heads Blade Coating Chrome Features Blade Hardened and Tempered with Microfine Graduations Protractor Head and Level Graduation Scale 4R Head Color Blue Head Coating Enamel