24 inch flexible steel rule can be used to measure rounded or cambered work, or as a straight edge SPI's EZ-View rulers features easy-to-read white graduations etched on black nonglare surface English SAE and Metric graduations: 32nds and 64ths of an inch & 1 mm and 1/2mm metric Industrial quality precision steel rule 28 inches long x 0.75 inch wide x 0.02 inch thick 24 inch flexible steel rule can be used to measure rounded or cambered work, or as a straight edge. SPI's EZ-View rulers features easy-to-read white graduations etched on black nonglare surface. English SAE and Metric graduations: 32nds and 64ths of an inch & 1 mm and 1/2mm metric. Industrial quality precision steel rule. 24 inches long x 3/4 inch wide x 0.02 inch thick.