Smart Crusher 2.5 " Wide Magnetic Aluminum 4 Piece Herb , Pollen Grinder + Free Scraper SHARP CRUSHER Aluminum used in making up this grinder is comparable & much stronger and far superior compared to Space Case grinders More Diamond Teeth for grinding than any other grinders Indestructible stainless steel screen Micron Count Tested Stainless Steel Pollen Screens, 2.5 Inch Wide x 1.75 Inch High.