DESC: The Rancilio MD40 grinder is specifically designed for grinding espresso coffee beans. This commercial grinder is capable of grinding beans into a powder and can withstand heavy use. This is especially important when you are grinding coffee for high-end espresso machines like the Rancilio Silvia and medium to heavy-duty espresso machines. There are very few grinder manufacturers on the market today with a stronger, more lasting reputation than the Rancilio grinders. The secret to the MD40 is the internals - metal, metal and more metal. Consider that the MD40 has a cast aluminum dosing mechanism, aluminum portafilter fork, brass dosing lever, and a heavy duty stainless steel housing. This is the ultimate aficionados grinder and is durable and precise enough to be used in commercial environments.