Ultimate Hand Exerciser Hand Strengthener Bundle - 2 Great Exercisers For Hand, Finger & Wrist Strength Training Exercises For Guitar, Piano, Golf, Tennis & Physical Therapy - Hand Exerciser With Adjustable Resistance For Each Finger Plus Stretch Band Exerciser - Full Instructions Included The M513 bundle consists of two outstanding exercisers: The MVR5 Hand Exerciser and the SA-13 Stretch Band Exerciser The MVR5 Hand Exerciser offers resistance adjustable from 3.0 - 8.5 lb on each finger, thereby allowing a single unit to meet all of your exercise needs. This saves you money because you would have to buy four fixed resistance exercisers to get the same exercise capabilities as one MVR5. The innovative 5-button design allows extension finger exercises, critical for piano and guitar players. The SA-13 Stretch Band Exerciser is the perfect compliment to the hand and finger exerciser. Using both exercisers together provides a complete strength training program for all muscle groups in the fingers, hand, and wrist. The bundle is great for athletes and musicians. Strengthens fingers, hand, wrist, and forearms. Promotes finger strength, flexibility, coordination and speed. Complete instructions and exercise programs are included for each exerciser. Full, no-hassle, money-back guarantee