Your review: I purchased extension kits to extend some shelving. I feel this was a big waste because I only used 2 screws and 2 of the thread post inserts out of each one. This is all I needed. I did not need the wall mounts because my selving isn't very high. A few of the inserts were striped when I put the screws in, but I used them anyway. I will not purchase this kit again.**sent to c/s 5/4.