Description High-quality MaterialAccurate scale:The square tool is made of precise and durable CNC-machined aluminum alloy,which is good oxidation resistance, not easy to break, rust-proof,corrosion-resistant and high hardness.The material is thick and feels very good in the hand.Rafter Square has a deep etching scale for superior legibility and long-lasting usage.And the carpenters squares scales are calibrated by professionals before production. Design Features: The protractor can be used with a square saw for cross or miter cuts. Combination squares can measure or mark angles from 0 to 90 degrees very quickly as a rafter square tool for angle measurement and serve as a saw guide for 45 and 90 cuts.A measurement unit conversion table is printed on the ruler for easy use. How to use: Rafters Square Set can be allowing the measurement of angles and pitches, adjust to the red angle rod, tighten the nut to achieve precise positioning, a useful feature when making repetitive cuts. Multifunction: The Adjustable Set Square as a protractor, miter, line scriber saw guide, framing square and a ruler.It can be used to measuring angles, check for aquare, adjust sawa, drawing circles,a saw guide, leveling, mark boards for ripping,finding roof pitch and so on. After-sales Service:We provide you with 30 days return guarantee6 Month free replacement,and 1 year warranty.Please feel free to contact us and we will provide you with a solution within 24 hours. The protractor can be used with a square saw for cross or miter cuts. Combination squares can measure or mark angles from 0 to 90 degrees very quickly as a rafter square tool for angle measurement and serve as a saw guide for 45 and 90 cuts.