Features CLEAR LASER SCALE: Good quality material, wear resistant and durable, laser scale is clear and accurate for you to read ACCURATE POSITIONING: The angle of the rotating handle can be adjusted, the positioning is accurate, and the marking is convenient WOODWORKING SCRIBING CUTTING: Suitable for woodworking for scribing and cutting at various angles, flexible and convenient to use LIGHT WEIGHT ALUMINUM ALLOY: Aluminum alloy triangle ruler is light weight, possess good strength and good corrosion resistance 7IN SIDE MEASURING RANGE: Side measuring range of adjustable triangle ruler is 7in, thickness for 5mm, three sides length for 194, 194, 272mm Spec: Item Type: Adjustable Triangle Ruler Material: Aluminum alloy Side Range: 7in Length of Three Sides: Approx. 194mm / 7.64in, 194mm / 7.64in, 272mm / 10.71in Thickness: Approx. 5mm / 0.2in How to Use: Common Rafter Conversion: inch rise / foot = degrees 1=4.75 2=9.50 3=14.00 4=18.50 5=22.50 6=26.50 7=30.25 8=33.75 9=37.00 10=40.00 11=42.50 12=45.00 13=47.25 14=49.50 15=51.50 16=53.25 17=54.75 18=56.25 19=57.75 20=59.00 Package List: 1 x Adjustable Triangle Ruler Notice: Fit to size before use. Package List 1 x Adjustable Triangle Ruler