Sorry, I'm really not being clear enough. I have a Naniwa adjustable stone holder. I'm talking about durability of the stone over the long term and it's ability to take the stresses of use and lapping if not attached to a permanent sturdy base like a floor tile or piece of wood. Some people do this with thinner naturals and this stone is very long and less than an inch thick, so I was wondering if I should be concerned with this one even though it is a synthetic.