Cast Iron Head with black wrinkle finish * 18-Inch Starrett no glare satin chrome hardened steel machine divided blade * Reversible lock bolt, spirit level and scriber * Graduation is Quick Reading 32nds, 64ths. Aircraft Quick Reading 50ths, 100ths * With reversible lock bolt, scriber, spirit level * Bearing surface is accurately ground * Graduation: No. 16R - quick reading 1/32", 1/64", aircraft quick reading 1/50", 1/100" * Square blade easy-to-read, sharp graduation