Add 5-10 MPH to your serve with the Helic Tennis Speed Weights that develop sport-specific speed and power by using the exact muscles and skills used in a game. The snap-on speed weights are a patent pending technology that allows the tennis player to hit actual tennis balls while the speed weights are on the racket. The tennis training program included features speed weights that are heavy enough to maximize conditioning effect yet light enough not to affect your natural swing mechanics. - Train under game-like conditions - Hit actual tennis balls - Develop Fast Twitch muscles - Retain natural swing mechanics - Increase serve speeds - Use for pre-game warm-up

$29.99