3-roller design let grains go between the top two rollers, and then pass through a second gap between drive roller and bottom third roller. In this way, grains are flattened and starch is loosen with minimal husk damage. Adjustment range: 0.025~0.1" (0.64~2.5 mm). Roller size: φ 1.3" x 5" (32 x 126 mm). Used for grinding all kinds of grains such as malt into even and smooth powder. Especially designed for malt, barley and wheat, not recommend for corns and soybeans. Great for barns, food industries and home brewing.