This dog exercise pen makes it easy for you to create a safe and comfortable space for your pet indoors or out for exercise and play. Attach the exercise pen to a matching training crate to increase your pet’s play area. Each dog exercise pen comes with: •8 heavy gauge metal panels •multiple options for pen set-up • 8 stakes for added outdoor security •easy access door for entrance and exit •instructions for set up and four different ways you can set up the exercise pen.