Muzzy ... I swear I am getting as bad as my father for memory. Mizzy Wheels not Muzzy Wheels. Sorry ....
http://www.armstrongtoolsupply.com/a...zy-wheels.html
This is not the site where I purchased mine. And actually mine are much thicker then these shown. But it gives you an idea. A lot of Mizzy Wheels are used in jewelry making too.
This is more like what I got. They fit my Dremel Tool and they will take the hump off a flint in seconds. And they don't seem to heat up. I actually take the hump down so that the jaw of the lock will fit the channel I cut off. Then the flint don't slide around.