This end mill looks quite impressive. The flutes are exceptionally sharp, and the shank has a smooth, polished surface. I've only tested it on HDPE so far. Cutting this type of plastic demands a highly sharp bit, and this tool performed fantastically—effortlessly, I might add. Quality carbide tools don't come cheap, so I find the asking price quite reasonable. Plus, it comes in a reusable plastic case to protect the cutting edges.