The Keystone 400 Cart Model – a full sized grill in a compact package; perfect for singles, couples and today’s smaller families. Grill the perfect steak and get grill marks on your burger every time. With a total grilling surface of 370 square inches (Primary: 268 sq. in. Secondary: 102 sq. in.), the Keystone 400 offers the perfect balance between performance and flexibility. Ideal for smaller patios and decks.