The Chuckit! is one sweet way to exercise your dog...without wearing out your arm. With the Chuckit!, you can throw that ball out of the ballpark over and over again. Use it in the park, in your backyard, or anywhere there is plenty of room. Made of lightweight, durable plastic, the Chuckit! uses a standard-size tennis ball and is designed for hands-free pickup... so you NEVER have to bend down and pick up a slimy ball again. Instructions: Find an open area, away from people, animals and buildings. With the ball in the Chuckit!, grip the handle firmly. Extend your arm back over your shoulder until the ball is behind you. Then swing it forward in a smooth arc and follow through. The ball will release when you swing it fast enough. Made of lightweight, durable plastic, the Chuckit! uses a standard-size tennis ball and is designed for hands-free pickup... so you NEVER have to bend down and pick up a slimy ball again.