I typically use pavers I have in the yard to chock both sides of one tire when I do any work on my truck, but they aren't much higher than 1-1.5".  These are nicer to keep in my garage than to bring in a muddy paver.  Since it's yellow, it's easy to spot in my garage, and they don't slip.  I've tested them by giving my truck a little gas while these are on and they prevent me from rolling.  They look good and do their job.  I like em....