From the product description, check product page for current description, price and availability:

• 【Large 7.7LB Hopper】 : Upgrade thicker hopper can holds up to 7.7 lb grains at one time. Large capacity for you to handle large batches of brewing. Especially designed for malt, barley, and wheat, not recommend for corns and soybeans.
• 【Powerful Knurls & Adjustable Clearance】: 5-inch rollers, 12 TPI knurl, efficiently pulls all your grains through while leaving the hull intact to form an excellent filter bed for sparging. The clearance of two rollers is adjustable to acquire a fineness of the rollers from 0.025 to 0.1 inch. A great helper for your homebrew!
• 【Strong Drill Mode】: Try to attach an electric drill and give your arm a rest! Gives a throughput of 7 pounds just in just one minute! much more powerful than traditional manual mode. ( 3/8 inch, low speed drill) If you’re brewing large batches, or want to maximize mash efficiency at any volume, you should definitely try the powerful drill mode!
• 【Healthy Food Grade Material】: All the screws and rollers are made of food grade stainless steel, solid and healthy. Less weight aluminium alloy for crank handle and hoppers, anti-corrosion and solid to last a lifetime. Less weight is more portable! Customized base can fit on a standard 5 gallon fermenting bucket. Which is great hardness, odorless and environmental friendly. (bucket is not included)