ITEM NAME:2Pcs 8mm Shank 3/8 and 5/8 Cutting Dia Woodworking Round Nose Cove Core Box 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.