The Roman Ogee Bit, which has a convex curve coming off the bearing, produces the reverse of the Ogee (it isn't an upside-down Ogee). the curve starts at the top as a concave, and fairs down into a convex curve. Use in a handheld or table-mounted router., #49204 diameter (D) 1-3/8, radius (r) 1/4, cutting height (B) 13/16, shank (D) 1/4, overall length (L) 2-1/4, replacement bearing 47704, flutes 2, 49204 carbide Tipped Roman Ogee 1/4 radius x 1-3/8 dia x 13/16 x 1/4 inch shank