Project X LZ features our proprietary Loading Zone Technology which produces maximum shaft load during the downswing and provides a smooth yet stable feel. Loading Zone Technology is achieved through variable wall technology in the shaft's butt and tip sections and a reduced stiffness in the midsection. Golfers can not only feel the technology, but see it as well in the rapid, tapered steps out of the grip through the midsection of Project X LZ. The loading zone is specifically positioned by flex to maximize ball speed and spin properties. Project X engineers created a unique recipe of a very flexible mid section-the loading zone-with a robust butt and tip section to create a radically different shaft load profile during the downswing.