Gravity operated set -- simply flip or invert to activate each grinder for effortless one – handed dispensing of salt and seasonings. ; Durable Eco – Friendly Ceramic mechanism easily grinds peppercorns, salt, and spices. ; Seasons accurately with adjustable ceramic grinding mechanism that adjusts from fine to coarse. ; Features a top – Top-mounted grind adjustor that never leaves a trail or mess, and an ultra soft textured non-slip grip. BPA – Free,; See – through container makes monitoring salt and pepper levels easy while multi-tone revealing the grinding action. TC guaranteed.