Carbide Tipped. Radius 1/16 Diameter 5/8 Cutting Length 5/16 Shank Diameter 1/4 Overall Length 1-3/4 2 Flute With Ball Bearing Guide Availability: Usually ships the next business day Amana 49492 Roundover Router Bit 1/16 Radius, 1/4 Shank amrobit49