This trolley is equipped with four-wheel steering and openable doors, up to 180 degrees, on both sides. When the tow-shaft is in its upper position the four-wheel steering is deactivated. As the trolley is towed the shaft activates the four-wheel steering. This ensures safe transportation of over ten units in a line. The standard wheel frame is zinced but is also provided in stainless steel. The wheel bearings are protected from dust and dirt. The dia is 200 mm. The trayracks are installed on the inner side of the doors.