I'm on my third one of these. It's a very simple little tool that makes changing strings a breeze. However, it's made of plastic that just won't stand up to a lot of usage in a drill. Drill bits are made of metal and so should this be. I'd happily pay three times as much for a steel or aluminum version.

When I first tried the Spin Doctor I thought it was way too wide to work on my mandolin. I even wrote a review stating that it wouldn't work. I was wrong. It works well, you just have to make sure your pegs are turned to provide the most clearance as there is just enough room.

The Spin Doctor String Winder works great on guitars, however will not work on mandolins. Mandolin is my main instrument so I purchased this in hopes that it would work on mandolins as promised in their add. The head is too wide to fit in between the tuning knobs. Big appointment.

This tool Rocks, Strings come on and off in minutes. Using a cordless screwdriver is the way to go. Great Job!!

I highly reccomend to only take strings off with this unless you have a really slow, weak, high slippage drill.