ITEM NAME:1/2''Cutting Dia Round Nose Core Cove Box Router Bit Cutter Tool - 1/4 Shank Description: - Core box bit is designed for reeding, flutingï ¼Å’sign making and general round nose grooving.. - It is especially effective in fluting flat surfaces. - Steel bits that meet the high demands of Woodworking and Hardware. - Industrial Quality - Tungsten Car.Core box bit is designed for reeding, flutingï ¼Å’sign making and general round nose grooving. - Cutting Length: 25.4mm. - It is especially effective in fluting flat surfaces. - Number of Flutes: 2. - Industrial Quality.