CMT 837.501.01 3-Piece Cove Bit Set, 1/2-Inch Shank Set includes 3 bits featuring the following radii: 1/4-Inch, 3/8-Inch and 1/2-Inch. Non-Stick Orange Shield Coating, Anti-kickback design. 2 SinterHip Hi-Density Industrial Chrome Carbide for long-lasting performance. Equipped with a bearing for easy and efficient template work. CMT bits were rated the best overall in comparison to other brands (Test by Wood Magazine).