435 CAST IRON HEADS Combination set with square, center and reversible protractor head and blade includes a reversible lock bolt, scriber, spirit level in both square head and protractor head. Cast iron head with black wrinkle finish. Fea tures • Direct reading double 180º protractor scale • Hardened steel, photo-engraved blade • Cast iron heads with black wrinkle finish 33H and HC FORGED AND HARDENED STEEL HEADS Combination square with square head has the same features as the 11 Series except that the square heads are forged hardened steel with smooth, black enamel finish. COMBINA TION Squares Cat. No. EDP Size Graduation Blade C33H-6-4R 56392 6" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Satin Chrome C33H-6-16R 56394 6" 16R – Quick Reading 32nds, 64ths,Aircraft Quick Reading 50ths, 100ths Satin Chrome C33HC-6-16R 56395 6" Satin Chrome - Center Head 33H-12-4R 50209 12" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Regular 33HC-12-4R 50210 12" Regular - Center Head C33H-12-4R 56396 12" Satin Chrome C33HC-12-4R 56397 12" Satin Chrome - Center Head C33H-12-16R 56398 12" 16R – Quick Reading 32nds, 64ths,Aircraft Quick Reading 50ths, 100ths Satin Chrome Cat. No. EDP Size Graduation Blade 435-12-4R 51556 12" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Regular C435-12-4R 66682 12" Satin Chrome - Center Head C33HC-12-4R C43-12-4R 97 starrett.com R ules and S quares