Adjustable 2 roller grain mill with a 7 pound hopper and wood base. To adjust, simply loosen two screws, adjust gap and re-tighten the screws. Attach a drill easily: Remove the handle with one screw and attach drill, no adapter needed. Hardened steel roller is 5" long and 1.25" diameter, and has a ball bearing design marked for easy adjustment. The crank shaft has a 3/8" diameter. It is suggested to run @ 300 RPM if motorized. Body is anodized aluminum for a lifetime worth of use. One Year Warranty on Mill with AIH. New & improved handle included with every mill.