With the Solis Scala Plus Coffee Grinder, you can grind coffee beans down to the desired size with 15 different settings. You can use this coffee grinder with your piston machine, cafetiere, or percolator. To start or stop the grinding, simply push the round button on the front. This convenient coffee grinder has an adjustable timer, which means the grinding will automatically stop after grinding the right amount of coffee beans. With 420 rotations per minute, the grinder makes sure that the coffee beans release more flavor. Collect the ground coffee in the included container.