Practice Grip is a pocket-sized hand and finger exerciser ideal for woodwind and brass instrumentalists who use keys or valves. This conditioning tool is designed with light overall tension to foster proper, healthy finger motion, digital independence, and increased finger speed and dexterity. The tension in each individual spring-loaded piston is adjustable, making this device also useful for finger, hand, and forearm strengthening. Customizable for various preferences or exercises, the musician can increase the resistance in each finger separately or collectively in all fingers.