The cost of a piece of metal in your eye.
Many of you guys talk about the "wheel of death". You're not putting a 1/4" shank wire wheel in a die grinder are you? If you are, shame on you! Most wire wheels are designed for a few thousand rpm's and the die grinders run 20,000 rpm @ 90 psi. That's a hand grenade you have there. I ask a lot of questions when I sell accessories like that on my tool truck. I want to match the acc. to the proper power tool. I sell a lot of safety glasses too. They won't stop everything from getting in your eye but they really help. I also sell glasses with bi-focals built in for the older guys. LOL
tmm