Super SW Durable Hand Grip Strengthener Finger Strengthener Trainer fit for Guitar Finger Strengtheners and Rock Climbing

Description: Using the Finger Stretcher helps prevent injuries and muscle imbalances from the overuse of. Exercise fingers, promote the flexibility in the hand and brain. Improve strength, power and speed in the fingers, palm, wrists and forearms. Improves finger span and flexibility, improves finger function and improves playing efficiency.The usage process does not affect any other activity on your finger. Size Chart: Medium Size: approx. 140 x 23 x 11mm/5.51 x 0.9 x 0.43inch Large Size: approx. 150 x 25 x 11mm/5.9 x 0.98 x 0.43inch Package Includes: 1 Piece Hand Finger Exerciser Note: Please allow a little size error due to manual measurement. Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the item's color may be slightly different from the pictures. Please understand.Thanks!