Working on some tall bookshelves so I am ripping 3/4" ply and using my dado blade to cut a rabbit in the edge. These wheels, that I have had for at least ten years, work really great. They hold the stock down, they force the stock into the fence (mainly why I use them) and they only turn one way so they prevent kickback. Love them. I have the dovetailed mounting brackets screwed to my fence top which allows the wheels to be removed easily when not in use.