I have a pneumatic "dremel" tool. I got it at Home Depot so it's a husky brand. I was doing tech support at a 24hr race this summer when it came in real handy. We have tanks of Nitrogen on the trailer so I was able to run it off of one of those. Two people with the new Shimano hollow tech two cranks were having chain suck. I was able to quickly remove the cranks and grind the burs from the rings. Those guys were stoked to be able to keep riding and not get chainsuck. I went out and bought the high speed tungsten carbide bit 'cause the original ones weren't very durable.