Features: Quality Material: The finger exerciser is made of quality ABS plastic material with fine machining, it is very sturdy and durable to use. Convenient to Carry: With compact and light design, you can carry it in pocket, bag or instrument case .You can use the finger exerciser to practice without your instrument anywhere any timing. Ergonomic Design: Unique ergonomic design and soft button, allowing you to exercise fingers, wrists and forearms while practicing the correct action for playing musical instruments practice. Adjustable Tension: The tension of each finger is adjustable, you can choose relevant tension according to your different needs. Widely Used: Suitable for the auxiliary exercise of instrument playing, physical exercise and , trigger ringer training, physical therapy and rock climbing. Great finger practicing tool for guitar and piano. Specifications: Material: Plastic Color: As The Picture Shows Package Weight: approx.82g Size: approx.88x21.5x67mm/3.46x0.84x2.63in (More Size Detail, Please See Photo.) Package Includes: 1Pc x Finger Strengthener note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!