The patented dual grinder design allows you to season your food faster than any other mill on the market. If you love fresh pepper this is the machine for you! All mills will work with peppercorns, salts, and some spices as we use ceramic grinders that are tougher than steel and will never wear out or rust. You do not need to take our mills apart to refill or change batteries. Superior ergonomics! A large fill hole and chamber with a clear, sliding, locking, window, make refills a breeze. Powerful led light to help you see in low-light situations. Uses 4 aa battery mills and comes with a dust tray to keep your counters and table free of pepper dust. Easy adjustment ring for fine to coarse settings.