Whether you are building an addition to your home, constructing furniture for your business, or crafting an art project for school, the Deadwood Craft Tools 12 Inch Standard and Metric Steel Edged Ruler ensures accurate and precise measurements for woodworking, metalworking, or engineering projects. 1/64 inches graduating increments are etched into one edge while 0.5 mm graduating increments are etched into the other. Increment markings are mirrored on back side of each 12 inch ruler. Squared edge and angles can be used to measure and to draw straight edges for DIY and professional projects. Edges may be slightly sharp; children should be assisted during use. 2 mm thickness with 1 inch width and 12 inch length fits in your toolbox, work bag, or notebook to make mobile measurement easy. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.