The WMF salt and pepper grinder set 2-parts made of wood is not only practical, but also a decoration for the kitchen. The combination of glass and oak gives the set a noble character. The container is made of glass, thus you can always see the current amount of pepper and salt. The upper part, which houses the grinder, is made of oak. WMF has chosen ceramic for the production of the grinder. It's a material that's harder than steel. Ceramic is not prone to corrosion, which is especially important in a salt mill. Wear due to abrasion are also not given. The contents of the mills are protected with a flavor protection lid. Particularly useful is the continuous control of the grinding strength. Since the grinder sits on the upper part of the mill, the mill can be turned off without any residues falling out. WMF gives a 10 year warranty on the ceramic grinder.