Easy installation, if you understand Chinese. A bag with screws and bolts I done need. Part K was never mentioned in the instructions. Its all together, but one problem. The connectors where it fits into the brackets don't match the same direction. One side of each post has a flat side for the locking pin but both are not facing the same direction. I can get the locking pin in on one side but not the other. if the seller or manufacturer wants to send only 2 mounting ends that match directions, I'd be thrilled. Reasonably priced.