Chicago Cutlery Metropolitan 20pc Block Set Professional high-carbon stainless steel blades with black polymer handles. Exclusive taper grind edge technology provides optimum sharpness for precise cutting and is easy to re-sharpen. High-carbon stainless steel creates a stronger, harder blade resisting stains, rust and pitting. Full Lifetime Guarantee Triple compression stainless steel rivets secure the handles to the blade for increased safety and stability