Zassenhaus Coffee Mills Zassenhaus are the leading manufacturers of manual coffee mills are widely regarded as the best in the world. Using first class materials and precise functioning, Zassenhaus coffee mills are built to grind coffee the perfect way. The hardened, high grade steel maintains optimum cutting edges and guarantees a grind suitable for any coffee brewing system. A Zassenhaus coffee mill gives consistent uniform grind for coarse to powder fine with the least possible heat build up to protect the most delicate flavours of the coffee. The grinding mechanism is guaranteed for 25 years.