2 Sets Black Finger Expander Adjustable Finger Stretcher Guitar Training Extender Hand Extensor Exerciser for Piano Guitar Ukulele Beginner

2 Pieces black finger expander adjustable finger stretcher guitar training extender hand extensor exerciser for piano guitar ukulele beginner Instructions of adjustable guitar extender: It may be a little uncomfortable for utilization at first, but you will get a significant improvement after a few days of practice; A long-time wearing is not recommended, 5-10 minutes exercise per group is preferred and repeated the exercise after full rest of the fingers. How to adjust the guitar finger expanders: The guitar extender in common size is suitable for most people; Please loose the screws with a screwdriver first, and then adjust the gap between the rings, finally fix the screw after you get the rings in a right position. Specifications: Material: Finger expanders: ABS plastic, copper nut Rod: fibre rod with silicone sleeve Size: as the picture shown Shape: as the picture shown Color: black Weight: 84 g Package includes: 2 x Guitar finger extenders Note: Manual measurement, please allow slight dimension difference.