What model do you have that it can hold a #70 drill bit? I currently have a small Craftsman. The spring broke about a year ago and I replaced it. It broke again about a month ago and I can't find one anywhere. It looks the same as a Rikon and they are not available either. Currently I have a rubber band doing a half assed job. The darn thing has no power either so I just need to decide on what I want to get.