The Bozo Sidepull is a replica of the headgear World Champion barrel racer Kristie Peterson used on Bozo. It allows your horse to be comfortable enough to really run in, yet gives you enough control to rate and regulate the run. It helps correct a horse that is over bending, and is more for the finished horse than for training. 7-1/2" shank. TIP: Kristie recommends that you ride your horse in the Bozo Sidepull a few times before running in it.