Trailer Jack Wheel with Split Clamp 60 mm Galvanised SteelUse this 60 mm trailer jack wheel with a split clamp to stabilise your trailer, or to assist in lowering your coupling onto a tow ball. Durable material: The 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 87. 5 cm and a minimum of 63 cm, more than enough to help detach couplings or lower them onto most tow balls. Solid rubber wheel: The