• 175mm square has a 175mm outside scale, 150mm inside scale plus a 3" scale on the bottom & 30mm on the ends
• 300mm square has a 325mm outside scale, 300mm inside scale plus a 125mm scale on the bottom & 35mm on the ends
• Outer rule is 16ths scale and has left to right and centering rule with small drilled holes every 1/16"
• Angle markings and drilled holes in the center from 5° to 60° in 5° increments plus a 22.5°
• Aluminum base with blue anodized finish is 1/2" tall and blades off set at 1/4" and 3/8" and a 45° cut out
• Squareness: 0.002" per inch
• Laser engraving on both sides of 2 mm blades
• Sets include a mechanical pencil and lead refills
• Supplied in protective box

Warning: Cancer and Reproductive Harm. www.p65warnings.ca.gov