1.【HIGH-QUALITY MATERIALS】 The salt and pepper grinder set is made of natural oak and ceramic grinding core, which not only resist shattering and durability but also are safer and more environmentally friendly than electric pepper grinders. Unlike ordinary pepper grinders, refined wood materials of the salt grinder are non-corrosive and antioxidative, keeps spices fresh for a long time, and protect the aroma. Nothing can bring your dishes to the next level like fresh spices! 2.【ADJUSTABLE COARSENESS】 Pepper mill set come with an adjustable high hardness ceramic grinding core that is non-corrosive, you can easily adjust the grind in them from fine to coarse by turning the top nut. (Tighten the fine grind and loosen the coarse grind). According to your dish requirement turn coarse sea salt, black peppercorns and other fillers into fine consistent powder with a good quantity and keep your table or countertop free of residue. 3.【CAN REFILLABLE】 Salt and pepper mills use a black and white