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 6 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 6 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 6 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.