The use of imported speical tool steel refining tool clearance adjustable , can be repeated sharpening and durable . 30 Seconds immediately recovered .do not focus on the grinding ,and to ensure a clean and dry.  The use of low speed , noise processing , noise is minimal, with a double limit switch , Optimize the design into the hopper , a speicial anti-rust treatment , the material in the grinding process to avoid leakage and contamination . Feeding device the perfect design ,very easy clear up by operators