I have used them on my drill press and they work great. The only wish is that there are more options for interchangeable grinding tubes. I've only found them in sets that include everything included in the kit. Larger packs of custom sizes and grits would be great. Also, the metal rod on the smallest drum broke while I was using it. It cuts exactly where the threaded part meets the smooth part of the shaft. The threaded portion of the shaft is still large enough to fit my chuck, but be careful with the lateral pressure you put on it.