The combination protractor is precision machined with lightweight aluminum construction and features a Tefon "O" Ring for smooth & precise operation. The scales on the dial of this new tool are laser engraved for exceptional accuracy. Compound cut conversion table (on the bottom leg with the tool facing up) specifically for the compound miter saw For cutting Crown Molding as it lays fat in the Compound Miter Saw and Directly transfer the "Miter Cut" conversions to the Compound Miter Saw.
From the Manufacturer
The Starrett ProSite CP505A-12 Combination Protractor is precision machined from lightweight aluminum and features a Teflon "O" ring for smooth and precise operation. The scales on this new tool are laser engraved for exceptional accuracy. As with all 505 series protractors, the CP505A-12 eliminates the guessing and the math, saving time and minimizing waste. The 5 great functions provide all you need to quickly master your work: Miter cuts, single cut, compound cut conversion table for cutting crown molding as it lays flat, protractor 0 - 180 - 0 and 180 - 0 - 180, and a quick reference to common roof pitches.