Most popular finger exerciser ever made.
The Gripmaster Exercise Tool has a rubber base contoured to fit snugly at the bottom of your palm for longer and more controlled workouts. Use it to build strength and dexterity in your fingers, wrists, and forearms so you can play longer and stronger. Options include: Extra Light Tension: For lighter workout. Light Tension: For beginners, younger players. Medium Tension: For experienced adult players.