I just received my 2 sets of 6 today and am planning to install them over the weekend. These look like they are just the thing that I need for storing my spice jars. I ran out of cabinet space and they are all piled on my kitchen counter. On Saturday I will glue them on the inside of my pantry door where I have plenty of space. I have not wanted to use spice racks if i had to use screws or nails or something that would harm the beautiful birch wood cabinets so I was delighted to find these at HomeTrends. In order to nstall them I need to clean the area with alcohol and then I have to warm the glue on the racks with my hair dryer and then attach them to the back of the door. As I bought 2 paks of 6 I have 12 racks each with 4 clips. So I can store 48 jars, if my math is correct. Each rack is designed so that the individual clip can be detached to allow for size and space needs. I think I made a good purchase. By the way did I say that the racks are made of white plastic. They seem to be very strong. I will say that you need to pay attention when you place the jars in the clips. I was not and I got one finger caught between the jar and the clip when I was trying it out. That's how I know the clips are strong.