Easy Tomato Slicer 2 Cartridge Blade Assembly are replacement parts. The blades are razor-sharp stainless steel for a smooth, precise cut. The frame and handles are constructed of commercial-grade aluminum. Keeping the blades clean is key to their precision. Now with such an easily removable cartridge, rinsing the blades after use is no problem. The blade cartridge just slides into place with minimal handling and cannot be installed improperly. Cut tomatoes and labor. - Metal - NSF - Sold per each