I need more information about the item and pictures please because I didn't know how to fix it to the grill,my old one has two small arms to fix it to the grill I don't know if I am talking about the same item Thank you

The briquette rack (that holds your briquettes or lava rock) sits on a ledge in the front and back of the grill. If you are referring to the warming rack, that is a different part. Give us a call, we will be happy to help you find what you need.