Ultra durable, rust proof and flavorful results - The grinding mechanism, made from advanced ceramic close in hardness to diamond, provide consistent, durable performance and will never rust. Excellent fine results are needed for ground peppercorns, sea salt, spices or seeds. The clever upright design will keep your counters clean from residual grinds. The blade (wheel) of this mill is made of ceramic porcelain and features delicate grooves that can be used to grind salt, spices, and peppers. The major benefit of the mill is that it has no metallic odor and consequently does not affect the flavor of the ground product. The ceramic blade is very durable and will never dull, which will keep grinding efficiently throughout the life of the mill. The base of the mill is made of PETG and the head is made of polypropylene (plastic).