I got two of these and they have come in handy already. I had to lift my table saw about 1 1/2 inch to slip parts for a mobile base under it, working by myself. These were perfect to slip underneath, and with a thin board on top to spread the load on the bag, 2 of them together were able to lift one side at the time. Without the air wedges I would have had to find someone to help me lift the table saw with a lever while I slipped the pieces underneath. I can see these will be very handy. You just need to do you know planning for how best to use them.