The Hullwrecker Premium 2-Roller Grain Mill is perfect for homebrewers and professional brewers who want consistent and high-quality grain milling. You can use it in your home brewery or a commercial setting. It has a 7 Ib capacity grain hopper, 5' long and 1.25' diameter hardened steel rollers, and an anodized aluminum body. The included heavy - duty metal base fits standard 5 or 6.5 - gallon plastic buckets. It also comes with a 10mm diameter nave shaft. You can operate it with the included crank handle or an electric drill.