Seriously nasty things, the times I've been sat at home that night picking wire out of my clothes...
Very useful though, the wire wheels are useful and the knotted wire wheels seem able to remove almost anything.
I don't wear gloves with rotating equipment like this, though the big old fashioned welding gauntlets are probably OK and the closest I'd come to using gloves. I was taught that anything that can be caught up in rotating parts is dangerous.