Big Horn 19578 Rafter Angle Square, 7 Inch, Aluminum

The thick edge is useful as a saw guide. It can be used directly with the saw against the square for cross cuts or angled cuts using the etched protractor scale. It can be used indirectly as well, using the scribing notches to create a saw cut line for rip cuts. Designed to make easy rafter pitch or slope calculations, this handy angle square is also suitable for use as a protractor, combination square and depth adjustment on table saws. The square tool is marked with inches and degrees with cast markings that won’t rub off. Easy to read and easy to use.

Where To Buy


  • For roofs, solar panel supports, stairs, cabinets trim work and many other layout projects. The rafter scales are laid out mathematically to avoid time consuming calculations
  • EZ-Read is a high-contrast, clear crisp, laser-etched graduations
  • Can be used as a protractor, line scriber, saw guide and tri/meter square and a ruler


  • Type: Rafter Square
  • Blade Length: 7”
  • Base Length: 7-1/8”
  • Graduation: 1/8”
  • Graduation (Degrees): 1.00
  • Material: Aluminum
  • 0-90° hypotenuse, 1-30 top cuts, 0-12 in. right angle side
More Information
Model# 19578
UPC 766565195789

California Proposition 65

Brand Big Horn
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