Maypole 461 Caravan Wheel Chock

Amazon

Maypole Caravan & Trailor Wheel Chock An essential accessory for caravans & trailors Vital safety device when parking or changing a wheel Best used in pairs for chocking two wheels on a gradient Simply and easy to use

Zoro Tools

Essential accessory for cars, caravans and trailers Vital safety device to prevent accidental movement Convenient handle