Lucky Dog. Pet Resort Exercise Pen. Modular, square-tube panels offer greater stability and design flexibility. Simple assembly, NO tools required. Steel frame has a two-step powder coat finish for durability, NO plastic parts. Center welded wire mesh creates NO sharp edges, helping keep your pet safe. Weatherguard cover is waterproof to help protect your pet from the elements. Lockable gate latch for security. 1" raised leg design on each panel, allows easy cleaning of the resort.