<https://www.couplemate.com.au/jockey-wheels/swingup-jockey-wheels/#webpage>
<http://schema.org/description>
"Swingup jockey wheels on caravans and trailers are fantastic, just swing it down into the vertical position and wind the handle until lift occurs."
<https://www.couplemate.com.au/jockey-wheels/swingup-jockey-wheels/>