Bests & Worsts Reviews from Amazon

The product may be useful, more so than a one-star rating, but the buyer should be aware that the name 'Diamond' in 'Diamond Burr' is just marketing nonsense. It certainly does not mean that industrial diamond dust is involved in any way. These are titanium coated. NOT titanium carbide nor tungsten carbide, both of which are a decent 9.0 on the moh's scale, quite hard (diamond is 10.0, the top of the scale). Titanium is only 6.0 on that scale, not all that hard. Like I said, they may still be useful, but I would have looked harder if I had done my research first.