Eight interconnected metal panels form a heavy duty pet playpen that works as a fence or gate to contain dogs while still allowing room to move and play. Each 31.5 x 48 in or 31.5 x 40 in steel panel connects with stakes so you can create different enclosure shapes and secure the structure to the ground for outdoor use. Round edges on the panels help reduce the risk of pets getting hurt. A black powder coating on the metal tubes resists rust and weather for long-term use and easier cleaning.