This is a close up of the large steel burrs of Kitchenaid mill attachment. It is easily disassembled for cleaning, with the small brush that came with it. I really like this unit, and it works very well with the smaller model K45SS Kitchenaid mixer we already had. Kitchenaid recommends the larger model mixers for this attachment,they have 'arms' to stabilize the mixing bowl. I also have a 'Family Grain Mill' attachment for this same mixer, but it will not grind corn. This same grinding unit is offered with it's own motor, a hand crank model, and a convertible version too. It is made in Germany by Messerschmidt. It does a fine job on small grains like spelt, rice, and wheat. It is an example of mills that some online sellers claim will grind corn, but the importer clearly says it will not. Unfortunately, it is not the only example of that I found. There are a number of different electric mills available, and Bosch makes a multipurpose kitchen machine. I don't have any experience with them, and I am satisfied with this much less expensive option for making flour with electric power. My favorite hand mill is the Porkert, but I have a Universal and a Corona, and they work too.