The SpeTool compression spiral composite router bit exceeds expectations with its precision design and superior quality. As a result of my tests, I determined that this bit works exceptionally well across a variety of materials, including wood and plastics. The compression spiral design keeps the cut clean and smoothes out rough edges, resulting in a polished finish every time. The only downside to this amazing tool is its cost, which may not be budget-friendly for everyone. Overall the SpeTool compression spiral router bit sets a new standard for cutting performance. .