OnCourt OffCourt Snap Racquet - Rapidly Improve Swing Contact/Helps with All Strokes HOW IT WORKS: The Snap Racquet snaps at contact to help players accelerate like the top pros in the world! Perfectly weighted to use as a warm-up swing aid as well as a stroke and timing improvement tool. CLINICALLY STUDIED: The Snap Racquet uses kinesthetic and auditory biofeedback to guide players to improve up to 4 times faster than without any guidance aid, according to clinical studies in sports training. Helps with all strokes! INSTRUCTIONS INCLUDED: Includes detailed photo instructions to help you get started. PROFESSIONALLY MADE: All our products are designed by Tennis pros with years of experience and expertise. ONCOURT OFFCOURT: We are the leading creative resource for youth tennis, training aids, court equipment and ball machines. Over 10 million players have improved using our products in over 100 countries.