High-quality, hardened stainless steel has acid-etched, color-coded graduations .
• Cork backing prevents slipping. Also raises ruler from work surface to eliminate ink smearing and bleeding .
• Calibrated on 2 edges with inches and millimeters. Inch calibrations include 16ths, 32nds and 64ths and the metric calibrations include 0.5mm, 1mm and "0".