These cove style cutters with two flutes, give radiused grooves for decorative panel finishes and board edges. For deep channels, take a series of passes. Ref. C056A is used with the Trend Draining Groove Jig. Dimensions: D=3/4 inch D=19.1 mm C=1/2 inch C=12.7 mm R=9.5 mm Shank Diameter=1/4 inch Shank Diameter: 1/4 Grade: TCT Diameter Imperial: 3/4 Diameter Metric: 19.1 Cut Length Imperial: 1/2 Cut Length Metric: 12.7