This device is precision-engineered to have a flexible shaft and counter-weighting system that work in combination to develop the ideal golf swing motion that is unique to each individual player out there. The golfer will find his/her ideal swing plane, achieve a seamless sequence of motion, create an optimal lag, and promote balance and build core muscle strength throughout the swing with this equipment. Currently, more than 150 tour pros use the device as part of their regular practice. That's how popular the equipment has become in a short period. That's why you should invest in the device to improve your golf swing.