Ultimate Herb Grinder 2 Inch 4 Piece Zinc Magnetic Top. Tobacco Grinder / Spice Grinder / Herb Grinder / Weed Grinder (Black) PRECISION MILLED from Ultra-Strength Aircraft Grade Aluminum for extra toughness, durability & best quality. SHARPEST DIAMOND CUTTING TEETH for extreme efficiency and effortless shredding. Stainless Steel Mesh Screen filters very fine pollen into the big catcher. STRONGEST NEODYMIUM MAGNETS for incredible closure, freshness & odor control. Thin Poly O-Ring for smooth grinding and less friction. SCRATCH RESISTENT Anodized Finish looks amazing and prevents flaking, pealing or smudge marks. The Lid Is Tight And You Can Grab Your Grinder By The Lid And Shake It And The Lid Stays On - No Danger Of Spillage.