All Things Barbecue XLarge Grate Stacker Combo fits Kamado Joe Big Joe and Big Green Egg XLarge. We've included everything needed to expand your cooking area. Stack a second grill grate 5” above the existing grate for increased grilling surface. The unique swivel allows for easy access to the lower grate. The upper support plate has a curved lip that insures a level cooking surface. The grate stacker piece affixes to the 24" grate and the top 18" grate swivels for easy access to main cooking surface. The Beam Clamp helps secure grates to ensure even the biggest chunks of meat remain stable throughout the cook process.