A load-bearing top plate which provides contact with a vehicle chassis by means of a bearing plate and is the part of a jack employed in cars and other vehicles for hoisting heavy loads to a certain small height or moving bodies at rest for a short distance exerting high pressure on them. It is characterized in that it has a lower piece, and a upper piece which is in contact with the vehicle and enables intended position of the aforementioned rotatable load-bearing top plate by first rotating over the aforesaid lower piece and then locking. One pin connects the aforementioned lower piece and upper piece. A pushing element is inserted around the aforesaid pin.