VEVOR JC23-ETR-5FT4PCS Manuel De L'utilisateur page 4

WEATHER RESISTANT - Both powder-coated and galvanized steel are built
tough to withstand water, rust and the elements. It can be used horizontally or on
the floor of your flat bed to secure tires, wheels and vehicles. The crush-proof
design can withstand cars parked on them.
INSTALLATION GUIDE
Common model：JC23-ETR-5FT4PCS, JC23-ETR-2FT4PCS
You can use screws to fix the track on the wall or floor, as shown here：
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