Can I use a floor jack on it and roll a refrigerator on it without it rolling up?

You can use a floor jack on our Coin Nitro Rolls without damaging the floor. You can also roll a refrigerator over the flooring without it rolling up. If for some reason the rolls did move when moving items over the rolls, you can place some double-sided tape or adhesive around the edge of the mats to keep them in place.