1. Heavy duty frame: made from industrial corrosion-resistant steel, indestructible and durable, hard to be damaged, nontoxic finished surface keep your dog health, suitable for most medium and large dogs, two locks with the safety buckles to prevent the high anxiety dogs from opening the door and escaping. 2. 360 degree rotated locking casters design: 360 degree rotated locking casters can help you to move crate anywhere easily and lock the wheels to keep the crate in place. 3. Easy to clean:Removable (slide-out) double tray helps you to catch the fallen dog food and excrement,and allows you to wipe and clean easily. 4. Easy to assemble:All hardware pack included,just need to fit it with four wheels and eight screw bolts,then insert slide-bolt latches,Just takes 3-5 minutes to complete.