Finger Flexion And Extension Training Device For Hand Grip Rehabilitation $ 15.29 Product information: Product Category: Rally Material: Other Choose according to fitness effect: muscle relaxation Color: Men's left and right general finger extension training device, women's left and right general finger extension training device, The fingerboard is a device that trains the fingers to separate and stretch, and to keep the fingers in the correct position. To use the fingerboard, you need to fix your fingers on the fingerboard with a fixing strap. Make the fingers detached and stretched. It should be removed when worn for about 2o minutes, Package: Male and female finger trainer x1