ITEM NAME:2x Woodworking Biscuit Cutter/Cove Core Box/Flush Trim Router Bit, 8mm Shank Description: Core box bit is designed for reeding, fluting, 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, fluting, sign making and general round nose grooving. Cutting Length: 8mm, 14mm. It is especially effective in fluting flat surfaces. The color may be different for different display, pls understand.