EHF-01 gives you a pocket-sized finger strength builder and warm up tool that's great for beginners and pros alike! The EHF-01 isolates each finger, providing an effective workout with its individually adjustable spring-loaded buttons. It's useful for conditioning the fingers, wrist, and forearm, giving beginning players increased fingering strength. Simulated guitar strings are hidden beneath the soft rubber palm grip to faithfully mimic the feel of guitar strings beneath your fingers. When your guitar's not around, you can still stay in playing shape with the EHF-01!