About wire wheels . . .
Some die grinders (typically having a collet that will accept a 1/4" dia arbor) can spin at about 20,000 rpm, which is not
recommended when a wire wheel is mounted in that die grinder. And those little wires, when they fly off, can easily embed
themselves into an operator's forehead. I was, of course, wearing eye protection when this happened to me. Total facial protection would have been better.
I share this information so someone else can learn the easy way, instead of the hard way -- like I did.