Includes galvanized steel shredder ring and grinding elements with 360 stainless steel swivel impellers, permanently lubricated bearings, and Quick lock mounting assembly for faster, easier installation. Also includes overload protection switch with manual reset, self service wrench to free simple jams, corrosion resistant grind chamber and sink flange, corrosion protection shield, dishwasher drain connection, and 1 piece plastic stopper. 3 year warranty.