Junior Flex. The Callaway XT teen golf set is for players between ages of 11 and 13 who want to further develop their skills and raise their performance. The XT set features industry-leading Callaway technologies and includes everything needed to add distance and to shoot your best scores. The ultra-lightweight set is engineered with easy to swing clubs for distance and has the forgiveness to make clean contact and hit solid shots. The XT set includes a 14° driver, 19° fairway wood, hybrid, 6-PW, SW, and putter, as well as a stand bag and headcovers for full course coverage. Second hand golf gear.