This part is the replacement shelf support for your refrigerator/freezer. It is made of white plastic and is approximately 1 inch by 1 inch. The shelf support attaches to the side of your refrigerator wall and supports the shelf. If your shelf is sagging or will not stay in place, you may need to replace the support. To replace the support, use a wrench to turn the support clockwise until you can use a flat blade screwdriver to pop it out. Push the new support into the hole left by the old one until it is flush with the liner, then use the wrench to turn it clockwise until it locks in. This part is sold individually and is and OEM part.