The Chuckit! is one sweet way to exercise your dog without wearing out your arm. With the Chuckit! you can throw the ball out of the ballpark over and over again. Use it in the park, in your backyard or anywhere else with plenty of room. Made of lightweight, durable plastic. The Chuckit! uses a standard size tennis ball and is designed for hands-free pickup. You never have to bend down and pick up a slimy ball again!