For machining through hard plastics such as solid surface and compact laminate, the highest quality finish and best cut life comes from a PCD tool. Straight PCD tools are highly effective leaving a mirror finish and lasting hundreds of sheets of routing compact laminate. They are the most cost effective diamond tools on the market due to their simple design.
Polycrystalline diamond is an extremely hard material (6000+ HV). It is up to 3x harder than carbide. In applications of hard plastics in particular, PCD can out perform carbide 10:1.