Starrett 11H-6-4R Combination Square The Starrett 6" Combination Square with Square Head features a reversible lock bolt, scriber, spirit level, and hardened steel, photo-engraved blade with regular finish. This product also includes a cast iron head with black wrinkle finish. 6", 4R Grad, Regular Blade FEATURES With reversible lock bolt, scriber, spirit level Graduation: No. 4R - 1/8", 1/16", quick reading 1/32", 1/64" Cast iron head with black wrinkle finish Square blade easy-to-read, sharp graduation Bearing surface is accurately ground 4R Grad: 8ths, 16ths, Quick Reading 32nds, 64ths Hardened steel, machine divided blade Reversible lock bolt Cast iron head Black wrinkle finish SPECIFICATION Made in America: Yes Blade Length (in): 6" Blade Finish: Regular Graduation Type: 4R Graduations: 8ths, 16ths, Quick Reading 32nds, 64ths Head Finish: Black Wrinkle Head Material: Cast Iron Head Types: Square Number of Pieces: 2