CMT 692.013.09 Cabinet & Joinery Set, 3-1/8-Inch Diameter, 3/4-Inch Bore Lightweight, aircraft-grade aluminum cutterhead. 13 pairs of M2 steel knives featuring 1-37/64-Inch Cutting Length. Delivered in a molded plastic case. Ideal for the professional woodworker. Included are profiles for raised panels, rail & stile, tongue & groove and cove & bead. RPM between 7000 and 9000.