The Butterfly Rhino wet grinder features two separate compartments for grinding. The stainless steel grinder is made of top quality steel which will stay rust-free even with regular use. It also features a plastic wet grinder which is made of ABS food-grade plastic. The quality of the material used for both the containers will endure all the wear and tear from frequent use and last you longer than usual. These two sets of grinders will help you with different kinds of wet grinding. So, use this versatile grinder and get ready to rule the kitchen.