As many other reviewers have noted, this item came with a part that was not fully secured within the packaging. On Fig. 2 shows a rubber insert that should have been fixed in a plastic base. Came out in one fell swoop. After I put it back in the hole, it stayed in place even after I took the bit out and reinserted it many times. That's Freud's fault, not Revain's, but the lack of proper padding in the shipping box is Revain's fault.