This TEC accessory is used to raise the height of the warming rack on your TEC grill from 3 1/2 inches to 6 inches above the cooking grates. This provides additional space on the cooking grates while also reducing the amount of heat that reaches the warming rack. This way, your food can sit and stay warm for even longer without the worry of overcooking. Just like the cooking grates, the rack jack is made of 304 stainless steel. This double rack jack covers the entire grill width of 44-inch Patio FR, Sterling Patio FR, and Searmaster FR grills.