First class material, excellent quality & precise operation. Zassenhaus has been the leading manufacturer of manual coffee grinders since 1867. The original Zassenhaus grinder coffee & Espresso mill is made from sturdy steel giving an extra long life through its special production technique. With a slight turn on the knurled screw you can fix the desired grind continuously, so you get a constant grinding result. The coffee beans are ground gently; as a result, all aroma & nutrients remain included. Because only freshly ground coffee brings the true pleasure. The degree of grinding can be adjusted using the knurled screw below the crank. By turning in a clockwise direction you get a coarser grinding grain, by turning counter clockwise a finer grain. Dimensions: 12 x 12.5 x 20cm. 25 year guarantee on the grinding mechanism.