The rubber chocks are available in 2 different sizes (small and large) and come with a 2mm stainless steel holder perfect for mounting to the back of a mining tray,
your motorsport trailer, ideal for boats.  The holder also comes with hardware for mounting.

Unlike plastic chocks the rubber chocks are design not to slip when surfaces are slippery and wet. The wheel chock sizes available are 125mm (small WC-1) and 200mm (large WC-2).