Product Description 6" Metric & English Scale Metal Ruler Flexible stainless steel...will not rust and need not be replaced for years. Precision made, 6 in. or 150mm rule for professionals and hobbyists. Etched graduations are easy to read and on one side only. Metric graduations are in millimeters across the upper half, and convenient graduations are in 32nds across the bottom. Drilled on one end for convenient hang-up near work area. California Prop 65 Warning : This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information visit to the website.