There are several surfaces we recommend to punch on. The most stable and consistent is a piece of veg tan (8oz) over a punch pad like this one, over a granite slab. In lieu of that setup, we like a punch pad on a stump or solid surface. You may use a stump, like we have at the school, but if you drive prong punches too deep into the wood, the tool gets bent up. Our tiny punch pad 2″x6″ can be used for a long time on both sides.