[Overdriven]

The cutoff wheels those kits come with are a joke, they shatter if you look at them the wrong way. The reinforced Dremel ones with the quick change mandrel are the best. Pick up one of them and put it in your drill chuck and give it a shot.

When using a cutoff wheel, slower speeds generally make the tool want to grab the work and jump around more. Higher speeds (to a certain point) generally slice right through instead of grabbing. Drill speeds were fine for my application, but for thin metal and/or fairly long cuts, a higher speed would help with control. All depends on the material and what kind of cuts.