Ragalta PLGS-013 4-Piece Double Boiler Set with Steamer Insert, 3-Quart Highest quality stainless steel construction for durability and fast, easy cleaning Handles are riveted for superior strength and long lasting durability Glass tempered lid and the boiler are dishwasher safe Sandwiched bottoms with thick aluminum disc for even heat distribution with no hot spots Heavy gauge, stay cool handles and knobs are ergonomically designed for easy handling and stability