359431 Specialty Molding Bit, 1-3/8" x 1-5/8"
Product information:
Two flutes, Ball bearing guide (Bearing 5/8") for crown molding, window casing and sills, baseboards, picture frames, chair rails. 
Two flutes, Ball bearing guide (Bearing 5/8") for crown molding, window casing and sills, baseboards, picture frames, chair rails.