Descriptions: Save your wrist from the torture of winding fresh strings. The GSW500 has all the features you?? expect from a standard string winder. Its durable plastic head makes for fast string loosening and tightening. The built-in notch removes acoustic bridge pins without marring the pins or the instrument itself. Works with most guitars, basses, banjos, and stringed folk instruments.This POP tub is an effective silent salesman on your counter. It's an easy add-on sale to any guitar related purchase! Includes 45 GSW5000 string winders.Also available: Refill bag. Ask your sales rep for Inv #11687 to order a refill quantity of GSW500's at a great price.