Hard to find risers for the bed. They give just the right and are stable.

I'm conflicted about how to rate these. On the one hand there's nothing wrong with the blocks themselves. They do raise the bed frame. They do raise the bed. However, the mattress frame on these blocks is very unstable laterally. My bed frame has eight 9" legs. I added two blocks under each leg. Did it hold the bed up? Yes - until while standing next to one side of the bed I leaned against the bed while reaching over to get something on the other side of the bed. The pressure on the side of the bed caused the bedframe to move sideways and it suddenly fell off the blocks. I don't see any way to make the configuration stable. So, there's nothing wrong with the blocks, but the setup is unstable. I am looking for a different solution.