Blue steel traditional French professional style cooking pan, suited to any power of heat. Properly prepared this will increasingly outperform any non stick pan, it will last a life time, and actually improve with age. It wont peel above medium heat or release plastics into your food, it will self repair if scratched. It will discolour, it will blacken, but this is a product of the steel bonding with the layers of oil and carbon that form what amounts to a natural non stick coating. Made in France by de Buyer, who have been making pans since 1830.