Solid Carbide honeycomb cutting router bits provide a burr-free top and bottom finish, providing that the workpiece is thicker than 0.250”. designed for cutting bioboard, falconboard, aluminum honeycomb (AHP) carbon fiber and honeycomb cardboard, #46302, (D) diameter 1/4, (b) Cutting height 3/4, (D) shank 1/4, overall length (L) 2-1/2, B1 1/4, max RPM 28, 000, flutes 6, 46302 CNC compression solid carbide ZRN coated honeycomb cutting 1/4 dia x 3/4 x 1/4 shank x 6-flute