I think they are regular #78 twist drills that are glued into aluminum handles, but they don't align axially as desired, presumably due to the large holes in the handles. I suppose this reduces the cost, but that's about all there is to say about this design. I have found corrective bandages useful but cumbersome, and bending too much is likely to break the denture, even if handled gently. They bend or break easily with the slightest force, so I don't belittle the delicacy in the slightest. The