Tungsten Extended Engraving Polishing Drilling Review

These are the best bits for the money. I used them to port 8 sets of aluminum sensors, 2 sets of iron heads and corresponding air intakes. They have withstood my abuse and are still pretty sharp. Get them when you need quality metalworking results.

The variety of types and sizes in this set is great, they work well for many different grinding and sanding jobs. So far they have also held up very well and stayed sharp. I recently used them to port my car's exhaust manifolds which are very hard cast metal. I was very satisfied with their good work. I expected them to be useless after this job, but they remain sharp. Compared to other brands that are much more expensive, the quality is very good for the price!