[Geof]

Originally Posted by ger21 Triple chip blades have a chamfer on the sides of the teeth. They're usually used on hard materials, like Corian, laminates, and non ferrous metals. http://www.freudtools.com/woodworker...24_LU90M_D.gif

To be really precise: a chamfer on the sides of alternate teeth, side relief on the teeth and no set to the teeth.

One tooth is square cornered, the next has chamfered corners and the next square all the way around. In a good machine on aluminum they can produce a very nice finish.