Extra-strong stainless steel ruler can be used to cut paper High-, 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. Imported From US