The line of coffee grinders from Ascaso can be described as beautiful, and best of all, excellent coffee grinding machines. Ascaso has developed two versions of their coffee and espresso grinder, one with a flat grinding wheel system and one with a conical (cone shaped) grinding wheel. The flat wheel grinder is called the I-1 Grinder and the conical grinding wheel version is called the I-2 Grinder.The Ascaso I-2 Coffee Grinder features a conical (coned shaped) primary grinder burr (grinding wheel) and it is the only professional grade coffee grinder for home and office use that features such a grinding system. Conical burrs are exceptional at producing the most consistent grinds, from very fine to very coarse, and they are particularly tough and long lasting. The grinding chamber is encased in commercial grade plastic composite. We recommend the conical grinding wheels if you will be doing general purpose grinding.The Ascaso grinders have a Micrometric Regulation System (MRS) or also known as stepless adjustment to control the quality and consistency of the grinds. This system allows for unmatched, precise adjustments to the grind setting, which is critical for espresso grinding. If you have an espresso machine, you will enjoy the convenience of being able to grind directly into the coffee holder for your machine.