$25 off orders over $75 + free shipping with rebate. Promo code: FLINGThe Hand Fitness Trainer works in the opposite direction of other hand exercisers to counteract the type of repetitive forceful gripping that can lead to tennis elbow and stiffness in the hands and fingers. Slip it on and make a fist. The reverse grip exercises improve your grip strength, dexterity and flexibility, so it’s the ideal product for musicians, fishermen, knitters and athletes. Fits either hand, with industrial-strength finger bands that adjust to each finger.