- 5 tools-in-one - tri-square, miter square, protractor, line scriber, and saw guide
- 1/4 in spaced scribing notches and Diamond cut-out for easy seat cuts on common rafters
- One-Number Method helps to make correct angle cuts for any pitched roof
- Black-filled markings and blue book
![Swanson Tools The Big 12 Speed Square, 12 in L, Heavy-Gauge Aluminum Alloy, 1 EA, #S0107 Swanson Tools The Big 12 Speed Square, 12 in L, Heavy-Gauge Aluminum Alloy, 1 EA, #S0107](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/239009/343005/698-S0107__67487.1593205168.jpg?c=2)