Features: For acoustic guitar, electric guitar, electric bass. It can be used together with the electric winding machine and is convenient to use. Guitar string winder, which can be used to remove the guitar bridge pin. It is suitable for loosening and tightening the strings of the acoustic/electric guitar or bass. It is ABS and metal material, which is wear-resistant and . It is an excellent auxiliary tool for a guitar players or guitarist. Specifications: Material: ABS and metal Width: 28.5mm/1.12 inches (Other sizes as shown in the figure) Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x String Winder Head Tool