The Helical cutting action is the ultimate way to surface wood and will eliminate fuzzy and chipped out grain defects even in cross grain. The Helix is a continuous compound shear cutting action that slices the wood off with low tool pressure. Our Super Helic heads use a simple one screw set gib design that wedges the corrugated carbide knives tightly using centrifugal force. All heads are currently right hand helix. New heads include a set of knives that are factory sharpened in the head for closer cutting concentricity. Knives can be resharpened many times. Heads are Made to Order with delivery at about 4 to 5 weeks. Superhelic(TM) Patent Pending.