Framing Square Base Length 24 in Blade Length 16 in Blade Width 1 1/2 in Blade Material Aluminum Graduation Marks - Base 1/10 in (Back) 1/12 in (Back) 1/16 in (Back) 1/16 in (Face) Graduation Marks - Blade 1/10 in (Back) 1/12 in (Back) 1/16 in (Back) 1/16 in (Face) Specialized Scales Octagon Base Material Aluminum System of Measurement SAE Square Type Framing Square Edge Style Square Features Markings Include Brace Measures Octagon Scale Board Measures and Rafter Table