PORTABLE DESIGN: Extremely portable design, you can carry finger strengthener in your luggage, pocket, purse, etc., strength your at any time when you . SUITABLE: The hand grip exerciser is suitable for finger strengthening for guitar, piano, trigger ringer training, arthritis and rock climbing. DIFFERENT TENSIONS: Highly versatile and fully adjustable hand exerciser and finger strengthener. Selecting different tensions for each finger . Easy to use and allows you to the grip strength of each digit based on current and results. PRACTICAL: versatility means it's also great if you need to rebuild hand strength or . It can work alongside , or separately, to help from surgery, trauma, stroke, damage as as countering repetitive strain injury, arthritis and carpal . Exercising hand muscles and joints helps support these vitally important joints and keep healthy. size: 8.8cm*2.15cm*6.7cm Material:ABS colour:black Package Contents: 1 * Finger force Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.