Turbo Tune

It's a well done tool. It's not very easy to use, it's a bit too long so when you turn the handle, it tends to escape from the machine knob if you're not perfectly in his axle. The second point is that the handle refuses to turn freely without modification (simple), unscrew the handle, pass a coat of wax on the part in contact between handle and arm then screw it again leaving a very small gap and you're done.
After having doing this it's better, just a bit too long.

Really speeds up string changing when used with a cordless screwdriver. Essential if you have a lot of guitars or change strings often.

Great for quickly winding strings. Best for use on a cordless driver as the handle width between the winder and the handle is a bit short for quick winding by hand.

Great for what it is designed for but I use the pull off handle for many other tasks. It powers my home made fret bender, I use it for screwing using hex head screw bits and also hex head drill bits for gentle hand drilling.

I use it everyday at the workshop for 4 years now. It fits any tuner. A drop of lube at the handle joint and it's ready. Far better than a lot of other stringwinders I tried.

The tuner fits the tuning knobs really well. Even on a tight fitting 12 string, you never hit the adjoining tuner buttons when cranking.This makes for very quick and efficient re-stringing.
However, the self tapping screw that holds the handle to the crank, will turn and tighten up as it is rotated, to a point where the handle will no longer turn freely. I had to loosen the screw up and apply glue to stop this from happening. Rectify this, and I will rate the Turbo Tune 5 stars. Far better than the commonly available "universal" tuners available.

Finally, a universal winder, both for manual and electric driver use. If you work with guitars, basses, or most any instrument with tuners, GET ONE TODAY!