Kreg | KMA2800 Crown-Pro Crown Coving Molding 138mm 5-1/2 Compound Cutting Guide Installing crown molding is one of the best ways to add instant value to your home. The Kreg Crown-Pro™ simplifies the most frustrating steps of the process, so you make fewer mistakes and get the job done faster! Exact Angles This uniquely-designed tool holds your trim at the exact angle required, eliminating the need for advanced compound miter cuts and difficult “coping.” Versatile Compatible Its curved design lets you compensate for a wide variety of crown molding spring angles, and its extension arms lets you work with crown up to 51/2" (140mm) wide. Easy Angle Finder The Crown-Pro™ comes with an adjustable Angle Finder that easily shows you the exact angle of inside and outside corners. Plus,.