Master Mechanic, 7", Aluminum, Rafter Square, This Versatile Angle Square Works As A Protractor, Rafter Square & Combination Square, Features A Solid Base For Standing In Place, The Angle Square Can Also Be Used For Depth Adjustment On Table Saws, The Measurements Are Cast Into The Tool Making Them Easy To Read Even After Hard Use On The Job, Blade Size: 10" x 7-1/4" x 7-1/4", Scale: Inches.