ITEM NAME:Carpentry 19mmx8mm Round Shank Core Box Router Bit Carbide Shaker Cutter 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. - It is especially effective in fluting flat surfaces. - Number of Flutes: 2. - Overall Length: 44mm.