These blocks are heavy and oversized. I am using them for a two axle enclosed cargo trailer but they can be used in any vehicle, residential, boat and trailer application where the user needs the ability to provide stability for storage, lifting, loading and unloading. The surfaces have a high friction potential and are non-slip. There are strong welded handles to make pad placement and pulling easier, which can be tied with string for easy access. This is a first class product, more expensiveโฆ