Upgrade your GENERAL Jointer with a Lux Cut III Head to achieve superior cutting results where tear-out is a thing of the past! These heads provide a glass - like finish on the wood surface and almost eliminate all needs for sanding your wood. Your machine will also run with much lower noise levels and the confetti-like sawdust will make your dust collection work much more efficiently! The insert knives are made from carbide which will last about 10 times longer than traditional high speed steel (HSS) knives. With 4 sharp cutting edges, you simply turn a knife 90 degrees when dull to continue cutting with a new sharp edge. 4 sharp edges will save you lots of money as these knives provide a life span of about 40 sets of traditional HSS blades (with one edge).