Elegant and simple acrylic mills add elegance and style to any table top. Durable, high quality acrylic mill. Ceramic mechanism harder than steel, odorless, rust and corrosion proof with a lifetime warranty. High grade stainless steel shaft for superior performance. Multi-purpose mill grinds pepper, salt, dry herbs and dry spices. Grind is adjusted by turning the top nut: turn it clockwise (tighten) for a finer grind; counter-clockwise (loosen) for a coarser grind.