The compact square shape is just the right size for all your small jobs in the kitchen! The covered saute pan has a vented metal-rimmed heat-tempered glass cover. Swiss Diamond is made of a revolutionary non-stick nano-composite using diamond crystals, which are natural conductors of heat. Diamonds are slippery and non-stick by nature, a perfect surface for cooking! Every pan has up to 200,000 diamond crystals the hardest material known to man to form a virtually indestructible non-stick cooking surface that will not peel, crack or blister or warp. It also features a perfectly flat bottom for cooking on all major surfaces.