The Juliana Combo Pepper Mill with Salt Shaker features a carbon steel grinder - the sharpest and most durable grinder on the market. Grinder cuts the peppercorn then grinds to release the peppercorn's rich flavor and aroma. It can be used with any dry spice including sea salt. Simply grind pepper from the bottom and shake salt from the top. Comes filled and ready to use. Lifetime warranty.