Made from Aircraft Grade Aluminum Rod using the newest in CNC machining technology, the Sharpstone Grinder also features high density acrylic so you can watch it grind! Razor sharp Diamond Cut- ting Blades makes it the most efficient Grinders on the market, and the Stainless steel pollen screen allows for only the finest pollen to fall to the bottom catch. When it comes to keeping it sealed the Powerful Neodymium Magnets are there for incredible closure, The Thin poly ring around top grinding section allows smooth grinding and no fric- tion. No Sharpstone is complete without their protective pouch and pollen scraper!