SharpStone - 4-Piece Grinder Pollinator Colored 2.2" Black Made from Aircraft Grade Aluminum Rod using the newest in CNC machining technology. 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. Comes with protective pouch and pollen scraper!