Feature:  1.High Quality Material: Made of heavy-duty Aluminum Alloy, solid aluminum alloy construction for durability.  2.Clearly Identifiable Scale: The rafter square finishing features low glare and protective powder coated. It has permanent deep markings and white graduations for max Readability any lighting.  3.Easy to Adjust: When in use, it can adjust to the required angel, tighten the nut positioning, press the middle adjustable lever to achieve precise positioning.  4.Multipurpose: with adjustable design, can be used as a saw guide, bevel or protractor. Convenient to hang and store when not in use. The edges and corners of each triangle are polished by special craftsmanship, so that it is smooth and does not hurt your hands.    Specification:     Material: aluminum alloy     Size: 272*193*193mm/10.7*7.6*7.6in     Color:Black     Package content: 1*Triangle Ruler     Metric or Inches