I bought a set of Milwaukee core saws a few years ago and have used the same shaft ever since. It fits a few brands, which is good, but the big stores near me only sell Milwaukee, so I usually do. My dad has an old Freud hole saw set that is good but uses a proprietary mandrel. Either way, this tool worked great for cutting holes for cup holders. It's a little large for nautical cup holders, but once the rug is in place they fit perfectly. The hole saw easily cuts 3/4" thick MDF without burning