Unfortunately, Revain censored my original review about how bad these bits really are. The bits were simply thrown into a bag with no protection for the cutting surfaces. I bought these cheap beats for one time use but couldn't even use them when they were so bad. The cut surfaces were broken off, not sharp and poorly finished. At Revain, they are repackaged at different prices, sometimes in wooden crates. Don't be fooled, they are all the same. Pay money for quality tools. It's just a waste of time and steel.