5. The new ProSite CP505A-12 Combination Protractor from Starrett provides fast, direct readings for: miter cuts; single cuts; compound cuts (with conversions for cutting crown molding); exact angle/supplemental angles; and roof pitch references. The tool is constructed of machined 1/4-in. lightweight aluminum, designed to withstand demanding jobsite environments. The 12-in. scissor-action legs are optimally tensioned and feature a Teflon "O" ring for smooth, precise operation.