We had different pads and they didn't hold our trailer so it rolled back and hit a tree damaging the $1200 trailer. Be wise and spend a little more to get something super powerful.
Pros
ALL WEATHER NYLON REINFORCED RUBBER: Unlike cheap plastic or rubber chocks that break, slip, tear or tear, these chocks are reinforced with nylon and are twice as strong as regular rubber. Dirt, dust, salt, ice, dirt, sun, sand and heat.