CMT 814.627.11 Round Nose Bit, 1/2-Inch Shank, 1/4-Inch Radius, Carbide-Tipped 1/2-Inch Cutting Diameter, 1-1/4-Inch Cutting Length, 2-7/8-Inch Length To be used for making grooves on wood and wood products Non-Stick Orange Shield Coating 2 SinterHip Hi-Density Industrial Chrome Carbide for a long-lasting performance CMT bits were rated the best overall in comparison to other brand (Test by Wood Magazine)