All sets include the basic 68mm (3/4″ bore) or 88mm (1″ or 1-1/4″ bore) diameter aluminum alloy cutterhead and seven pairs of interchangeable profile knives. Also included is a custom hardwood storage box, hex key and color poster showing many of the different available knife profiles. Any of the 64F Series or 690 Series knives may be added for additional versatility. Includes 2 bushings 3/4″ to 1/2″ on the 68mm (3/4″ bore) sets. 2 styles to choose from in 3 bore sizes.  Ideal/max. RPMs 7,000-9,000.