This 12" diameter stainless-steel rack solves several problems. For anyone who does much preserving of vegetables, fruit, etc., the rack fits snugly in a 12" canner and lets you use jars of any size because the fine mesh prevents small jars from tilting as they frequently do on the widely spaced wires of conventional canning racks. Four legs keep the rack surface 1/2" (1.3cm) above the canner bottom.Also, it is an ideal cooling rack for large round cakes or anything else you want to cool on it. The fine mesh restricts sagging of freshly baked items. Since the rack withstands temperatures of up to 450°F (232°C), it can also be used as a cooking rack in an oven.