The present invention disclosed an apparatus and for lifting and sliding object over barrier in horizontal direction, comprising two lifting beams that placed on supporting structures and located above object to be lifted and a barrier, and a lifter installed on the lifting beam. The wagers may be horse race wagers. The extension platform would adjust horizontally in conjunction with the tailgate to effectively increase the contained storage area of the vehicle. The presence of the bone at the outer edges of the socket helps to stabilize the component. The inert gas injector comprises an inert gas diffuser mounted on the periphery of the housing for receiving the welding torch.