Frisco Dog & Small Pet Wire Exercise Pen with Step-Through Door, Black, 30-in; The Frisco Wire Dog & Small Pet Exercise Pen with Step-Through Door provides a safe and secure play area for dogs, cats and rabbits, whether indoors or outside. Constructed using sturdy metal wire coated in durable black e-coating, it’s made to last. The easy-access doorway securely latches closed with double locks and an additional safety clip. Metal anchors are included to keep the pen in place when used outdoors. The eight hinged panels can be configured into square, rectangle and octagon shapes, with plastic corner stabilizers included for the octagon configuration. And it conveniently folds flat for easy transport and storage.