Bike Tek Adjustable Wheel Chock. 1pc construction wheel chock provides excellent stability of motorcycles in transit and storage. 38mm tubular steel costruction. Steel base-plate for front wheel location features 2 side-plates to grip front wheel. Side-plates are lockable and width adjustable up to 8" maximum, to ensure secure fit. Can be used free-standing, but can also be permanetly fixed to ground or inside vehicle by via 2 fixing locations (fittings not supplied) For use in several locations an optional quick-release plate is available, enabling the wheel chock to be removed quickly and easily - ideal if the chock is used inside a vehicle. The quick-release plate can be bolted to any fixed surface via the 4 fixing location (fittings not supplied), the wheel- chock simply connected by 1 bolt- fitting. NB: Intended for use on front wheel of motorcycles only.