This 5 inch square Large Wonder Skillet is ready to use. Wonderful for cooking individual eggs and other dishes. The ultimate grilled cheese pan. The American-based company Lodge has been fine-tuning its construction of rugged, cast-iron cookware for more than a century. No other metal is as long-lasting and works as well for spreading and retaining heat evenly during cooking. Lodge's Logic line of cookware comes factory pre-seasoned with the company's vegetable oil formula, and is ready to use right out of the box. After cooking, simply scrub the cast iron with a stiff brush and hot water, no soap, and dry immediately.