SharpStone® Brand absolutely stands up to the $100+ grinders on the market. 2.2" vibrating grinder/pollinator in classic silver or black - from the great people at Sharp Stone. Made from Aircraft Grade Aluminum Rod using the newest in CNC machining technology. Lithium battery operated vibrating function, with the push of a button this grinder vibrates allowing the pollen to sift into the last chamber. Anodized for smooth finish; this means no wear or smudge marks. Razor sharp Diamond Cutting Blades for extreme efficiency. Stainless steel pollen screen allows for only the finest pollen to fall to the bottom catch. Powerful Neodymium Magnets for incredible closure. Thin poly ring around top grinding section, for smooth grinding and no friction. Battery included. Comes with protective pouch and pollen scraper!