This heavy-duty metal dog playpen delivers a secure open activity area suitable for puppies, small, medium and large dogs for indoor and outdoor use. Constructed from sturdy welded metal wire, the robust frame resists biting, scratching and impact for long-lasting service. The flexible connected panels can be freely arranged into octagon, rectangle or other shapes to adapt to living rooms, gardens and yards. It comes with a built-in locking door for easy pet access and effective escape prevention. No complicated installation tools required you can assemble or take apart the pen effortlessly. Open wire structure maintains great ventilation while keeping pets safely enclosed. Create an independent play space to protect your pets and furniture simultaneously.