Jockey Wheel for Trailer with Split Clamp 48 mm Galvanised SteelUse this 48 mm jockey wheel with a split clamp to stabilise your trailer, or to assist in lowering your coupling onto a tow ball. Durable material: The jockey wheel trailer is made of galvanised steel, which makes it resistant to rust and weather. Adjustable design: This car jack can be adjusted to a maximum height of 82 cm and a minimum of 59 cm, more than enough to help detach couplings or lower them onto most tow balls. Inflatable rubber wheel: The