Carbide tipped. 2+2 raised panel bit combines 2 small wings that cut downward - shearing top edge for splinter-free surface; 2 large wings shear upward for smooth finish. For creating decorative tops, plaques, and molding. Use on table mounted portable routers. 2 wings to do the main cutting of the profile, while 2 others cut the top part of the profile. 1/2" shank.