I really wanted to try something to keep my rugs down in our 3 season room at the back of the house. I have one mat by the door and when I placed the rug gripper on it it didn't hold for more than less than a day. It started to come undone and moved. I put the grippers on my other rug by the doorway and that moved about a day later. I'm not saying these rug grippers don't work I thought they would work on a indoor outdoor carpet and keep them in place. No doubt these are only for rugs attached to floors not rugs.