42" Black Exercise Pen with Full MAX Lock DoorThe patent pending MAXLock Door System enhances security by providing multiple lock points around the perimeter of the door. The ergonomic locking handle allows you to easily and conveniently operate the door in one motion without kneeling or bending. Simply lift to unlock, and swing the door open. As you close the door, just lift, position the door against the pen, and lower it into the eyelet latches. Secure the handle in the down position to lock