Bought this when my flex shaft stopped working and wanted to try something different. I've had it for over a year now. It worked well initially, but it doesn't have as much power as a flex shaft. At times when I'm working on a lot of pieces, it would overheat and stop working. It only fits one size bit. It came with a collect chuck sleeve for the smaller bits so it can fit either 1/8" or 3/32" tools. But I find it annoying to have to remove and replace when switching tools. Overall it's nice and quiet and work well when you're not working on a lot of pieces. It's just not for me.