This is a peg winder that can be used to speed up the process of restringing acoustic and classical guitars. It is in three parts: the handle, the basket (that goes over the guitar peg), and the pin (that holds the other two pieces together). 

I have made some adjustments; the pin snapped off twice, and it's a tight enough fit now that it requires a bit of sandpaper to shave it down to make it fit into the handle, but I am confident it won't break off now.

I will be making a version for a 12-string guitar, a mandolin, and a six-string balalaika as well.