
I bought these bits from stock for about half the price of new, they say they are very good. When I received them, I immediately noticed that the 5/8 bit was missing a guide pin, was slightly discolored, and felt noticeably less sharp than the other bits. I can only assume that the original buyer had the project, didn't use enough coolant and returned the bits. The 9/16 bit had some "Project Metal" leftovers, but it appeared to be in good condition, as did the rest of the set. I will keep this set and use it as is, but be prepared for a surprise if you buy "Amazon Warehouse".