if i'm not mistaken, most dremel tools use a 1/8" shank tool. therein is the problem. while ok for light use, if you need to go deep, or remove a lot of material, the 1/8" shank will have a ton of deflection if extended out to go deep, and will more than likely break due to bending and the forces needed to remove a bunch of material no matter what bit is used. you seriously need to consider a 1/4" shank tool. if, by some chance, your dremel has a 1/4" shank, disregard this comment.