Rafter Square Scribe Notch End 5 1/2 in Scribe Notch Start 1 in Includes Not Applicable Center-to-Edge Heel Width 3/8 in Scribe Notch Graduation Marks 1/4 in Scribe Notch Location Top Square Size 7 in Square Material Aluminum Graduation Mark Style Etched Graduation Marks - Base 1/8 in Graduation Marks - Blade Not Applicable Specialized Scales Degree Scale System of Measurement SAE Square Type Rafter Coating Anodized Edge Style Square