IRWIN Tools Rafter Square, Hi-Vis, 12-Inch (1794467) Permanent, deep framing square markings Thick, high-impact ABS rafter square body High-visibility orange construction square Used for marking angles, cutting rafters and scribing lines Can be used as a protractor, saw guide and tri and mitre square Permanent, deep framing square markings Thick, high-impact ABS rafter square body High-visibility orange construction square Used for marking angles, cutting rafters and scribing lines Can be used as a protractor, saw guide and tri and mitre square