The Kegco 3PKM7GM-2R Grain Mill has a robust construction with an aluminum hopper that can hold up to 7 lbs of grains. It features an alloy block frame that houses two steel rollers on stainless steel ball bearings. The drive shaft and all axles are integral to the roller, which makes it possible to drive the mill clockwise or counter-clockwise. A hand crank is include: however, the mill can be easily motorized with a drill for automated milling. N additional attachments needed, just stick the drill on and start milling. Stainless knurled knobs allow a gap spacing adjustment range of .025-.100a1/21/2. Adjusting is simple - just loosen the adjustment screws, adjust the gap and tighten the adjustment screws. Also, includes a black metal base that fits over common brewing buckets and smaller mash tuns.