If you fix guitars for a living, either in your own shop or at a music store, the best investment you can make towards your business is to buy a guitar string winder. It’s not so bad if you’re restringing one or two guitars at home, but when you have a bunch of guitars that need new strings, it can literally get very painful after a while restringing by hand. Also used by guitar builders and guitar roadies alike.
Guitar string winder:
Guitar string winder pictured: Planet Waves Pro Winder String Winder and Cutter
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