Main features of the spiral cutter heads
* Produce glassy surface finish with no tear-out 
* Dramatically reduce noise. 
* Tungsten carbide inserts last 50 times as long as straight blades do. 
* No need to sharpen the inserts. Turn 90 degrees for a new edge. It's easy and time-saving. 
* Spiral cutter head makes short and thin chips. Dust extraction is easier. 
* We include additional (5) carbide inserts (5) screws as spare parts for each cutter head. 
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