Set of 4 - High-quality exterior enamel protects against metal marks and other damage * Hard-wearing, impermeable finish fired at temperatures as high as 2192ºf is safe for cutting on with knives * Unmatched thermal resistance from -65ºf to 500ºf ? safe for the freezer, microwave, oven, broiler and dishwasher * Less than 1% porosity, blocking moisture absorption which can lead to cracking, crazing and rippling along the interior * Unique clay mixture creates a very dense material when fired, maintaining even temperatures and preventing scorching