ITEM NAME:5Pcs 6mm Shank Round Nose Cove Core Box Router Bit Cutter for Woodworking 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, high abrasion resistance, high-precision grinding technology. - Tungsten car.Core box bit is designed for reeding, flutingï ¼Å’sign making and general round nose grooving. - It is especially effective in fluting flat surfaces. - Number of Flutes: 2.