I did a lot of research before buying and unfortunately made the wrong purchase decision. I received 10 pairs, 6 of them installed. On 4 of them I was never able to open the side releases to allow them to be installed. Now 2 of these are literally stuck in the closet because once installed they won't get out. I have no idea how to get these boxes out. Suggestions on how to get them for free? The fact that 4 out of 10 is NOT a problem YET is not good enough for me. Luckily they refunded my money when I contacted them (via Revain). Fix the damage now and start over with a different brand!