If they're quality bits they're probably made from O1.
Heat the tip of one cherry red with a propane torch,..get it glowing bright enough that the surface begins to flake, (very bright!) then quickly dunk it in some old motor oil.
Stand back when ya dunk it and don't have anything flammable close to it. It's going to *poof* a flame up when it hits the oil.
If it's made from 01, the cat won't be able ta scratch it when you get it out of the oil.
