CMT 692.013.11 Cabinet & Joinery Set, 4-Inch Diameter, 1-1/4-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 5500 and 8400