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.

Specification:
D=3/8 inch
D=9.5 mm
C=1/4 inch
C=6.3 mm
R=4.8 mm
OL=46.5 mm
Shank Diameter=1/4 inch