The Swivels are a great teaching tool to help learn proper coordination and kinetic chain of movement of the coil and uncoil. Learning to be athletic is key and the Swivels are that connection. If you want control and power Excalibur is the place to start. Not that easy to do but boy it teaches you to stay on the ball and compress through the hit which is key to power and control.

"Jack's invention, the Swivels are the best tennis training device I've ever seen!"

"My brother and I have known the fluid strokes and feeling of being 'connected' in the game of tennis for much of our lives. It's great to know the science behind this feeling, so we can use this knowledge to play even better. Jack's revolutionary learning system and various devices, including the Swivels, can help every player feel and groove the natural strokes."

“All Jack’s kids are great! They have smooth strokes and complete games. I’ve use the Swivels for the past ten years with both my varsity teams and my Nike camps. Everyone loves it because you can really feel the fluid strokes!”

"The Excalibur is one of my preferred training tools for my students to find the best possible contact point."

"My game improved 10x in 2 weeks."

"I trained at the world's premiere academies. Nothing compares to one week with Beyond Tennis."

"After searching for 20 years, I finally found it... I found it."