I have heard of them, seen them on TV and I needed to hang something that was not a picture and used the Command Performance General Hook Pk...OMG, it was so quick & easy and even tho I have since removed them I always, always have them on hand now for any emergency. Believe it or not, I have used them on my windows in my car for shades because I got tired of the round licky ones falling off. These remove easily as from wall and stay put....LUV IT [This review was collected as part of a promotion.]