The Mammoth 2-Roller adjustable grain mill is constructed using materials that will last a lifetime. It has stainless steel rollers, aluminum body, stainless hopper and bronze brushings. This adjustable 2-roller mill offers a professional grade crush for barley, wheat and other cereals. The hopper can hold up to 6.5lbs (3kg) of grains. A hand crank is included, but the mill can also be easily motorized with a corded electric drill for faster and easier use. Stainless knurled knobs allow for easy gap spacing adjustment with a range of 0.70”. Adjusting is simple - just loosen the adjustment screws, adjust the gap and tighten the adjustment screws.