Pure snake oil, do not buy. Granted bits are usually sharp enough to do some damage to a person, thinking they are not sharp (hence wax ended) But one thing to REALLY be careful with is planer blades, DAMN I found out the hard way, that my blade was STILL sharp after 100BD Ft was already run through it. I BARELY touched it, and nearly needed a stitch or two. However it cut so cleanly, that with light pressure it was back to new in a day. (my finger that is), and yes it may have been stinky, only because I had stayed at a Holiday Hilton the night before.