Rafter Angle Square has a handy 6" rule for quick measurements and scribing. The easy-to-read angle scale allows you to find any angle from 0 degrees to 180 degrees for many of your special designs such as carvings, picture framing, furniture, room dividers, shadow boxes, "cut-outs", routings and more. The rafter scales are laid out mathematically to take the time-consuming calculations out of your layout work. This gives you the accuracy you need with the convenience of using one number to work with. The Rafter Angle Square also makes an excellent right angle guide for an electric saw to run against. 6" (150mm) aluminium alloy speed square. The square includes a handy 7" ruler with clear markings for quick measuring and scribing They can be used as an accurate saw guide, protractor and tri-square, 90° and 45° mitre square. Easy to read scale allows you to find any angle from 0-180 degrees. PACKAGE CONTAINS: 6" Aluminium Alloy Roofing Rafter Square Triangle Angle Guide MARKSMAN, Manufacturer: Paulstore