Combina tion Squares 11HC Cast Iron Heads With reversible lock bolts, scriber, spirit level (except 4"), and hardened steel, photo-engraved blade with regular or satin chrome finish. Cast iron heads with black wrinkle finish. Combina tion Squares with Center Heads C33HC-12-4R C11HC-12-4R 33HC Forged and Hardened Steel Heads These squares have the same features as the 11HC cast iron heads except that the square heads and center heads are forged hardened steel with smooth, black enamel finish. 4-24" Combination Squares with Square and Center Heads 11HC Cast Iron Heads with Black Wrinkle Finish 33HC Forged and Hardened Steel Heads with Smooth Black Enamel Finish Size Graduation Blade Cat. No. EDP Cat. No. EDP 11HC-4-4R 50050 33HC-4-4R 50204 4" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Regular C11HC-4-4R 56361 C33HC-4-4R 56391 Satin Chrome 11HC-6-4R 50052 33HC-6-4R 50206 6" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Regular C11HC-6-4R 56363 C33HC-6-4R 56393 Satin Chrome 11HC-6-16R 50054 33HC-6-16R 50208 6" 16R – Quick Reading 32nds, 64ths, Aircraft Quick Reading 50ths, 100ths Regular C11HC-6-16R 56365 C33HC-6-16R 56395 Satin Chrome 11HC-12-4R 50056 33HC-12-4R 50210 12" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Regular C11HC-12-4R 56367 C33HC-12-4R 56397 Satin Chrome 11HC-12-16R 50058 33HC-12-16R 50212 12" 16R – Quick Reading 32nds, 64ths, Aircraft Quick Reading 50ths, 100ths Regular C11HC-12-16R 56369 C33HC-12-16R 56399 Satin Chrome 11HC-18-4R 50060 33HC-18-4R 50214 18" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Regular C11HC-18-4R 56371 C33HC-18-4R 56401 Satin Chrome 11HC-18-16R 50062 33HC-18-16R 50216 18" 16R – Quick Reading 32nds, 64ths, Aircraft Quick Reading 50ths, 100ths Regular C11HC-18-16R 56373 C33HC-18-16R 56403 Satin Chrome 11HC-24-4R 50064 33HC-24-4R 50218 24" 4R – 8ths, 16ths, Quick Reading 32nds, 64ths Regular C11HC-24-4R 56375 C33HC-24-4R 56405 Satin Chrome 11HC-24-16R 50066 33HC-24-16R 50220 24" 16R – Quick Reading 32nds, 64ths, Aircraft Quick Reading 50ths, 100ths Regular C11HC-24-16R 56377 C33HC-24-16R 56407 Satin Chrome 150-600mm Combination Squares with Square and Center Heads 11MHC Cast Iron Heads with Black Wrinkle Finish 33MHC Forged and Hardened Steel Heads with Smooth Black Enamel Finish Size Graduation Blade Cat. No. EDP Cat. No. EDP 11MHC-150 56242 33MHC-150 56248 150mm mm and 1/2mm Both Sides Regular C11MHC-150 56381 C33MHC-150 56411 Satin Chrome 11MHC-300 56244 33MHC-300 56250 300mm mm and 1/2mm Both Sides Regular C11MHC-300 56383 C33MHC-300 56413 Satin Chrome 11MHC-600 56246 33MHC-600 56252 600mm mm and 1/2mm Both Sides Regular C11MHC-600 56385 C33MHC-600 56415 Satin Chrome 300-600mm and 11-3/4 – 23-1/2" Combination Squares with Square and Center Heads 11MEHC Cast Iron Heads with Black Wrinkle Finish 33MEHC Forged and Hardened Steel Heads with Smooth Black Enamel Finish Size Graduation Blade Cat. No. EDP Cat. No. EDP 11MEHC-300 50068 33MEHC-300 50222 300mm and 11-3/4" 1/2mm and 32nds One Side; mm and 64ths Reverse Side Regular C11MEHC-300 56387 C33MEHC-300 56417 Satin Chrome 11MEHC-600 50075 33MEHC-600 50238 600mm and 23-1/2" 1/2mm and 32nds One Side; mm and 64ths Reverse Side Regular C11MEHC-600 56389 C33MEHC-600 56419 Satin Chrome 269 starrett.com S quares