Overview Reviews Product Description This professional tool has permanent deep stampings are durable.The aluminum body is rust-proof and weather-resistant.The square has multiple scales: 1/8-, 1/10-, 1/12-, and 1/16-inch.Can be used as a protractor, saw guide and tri and mitre square, and ruler.Irwin tools rafter square, aluminum, 7-inch (1794464). Irwin Tools Catalog Product Videos Custom Field Manufacturing country CN Product Reviews Write a Review Write a Review × Irwin 7" Aluminum Rafter Square 1794464 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *