Masterdam Rolling Supplies 2.2-Inch Herb Grinder with Pollen Catcher - 4 Piece, Black SUPERIOR QUALITY AND DURABILTY - Precision milled 4-part, 3 chamber grinder made from anodized Aerospace Grade Aluminum Alloy with a super slim, non-stick nylon O-ring for silky smooth grinding; Our 100% CNC machined pieces fit perfectly together and nylon ring prevents metal-to-metal contact when grinding, preventing residue build up and sticking unlike inferior zinc-alloy versions. PERFECT GRIND EVERY TIME! - Filled with up to 28 razor sharp "Lion's Tooth" curved diamond teeth to cut and fluff your herb, our grinders ensure the optimal coverage and surface area. Precisely sized and placed holes in the second chamber ensure that only herb ground to the proper size falls through to the holding chamber below -- essential to getting the most out of your rolling experience. VERSATILE STORAGE AND PORTABILITY - The magnetic lid is held tightly closed for storage by two strong rare-earth neodymium magnets, the strongest available! And, a carrying bag allows you to easily and securely take it with you! Discreet Packaging - our grinders ship in a plain cardboard outer box with no reference to the contents. Your herb grinder arrives undercover! MICRON SCREEN AND MINI-SCRAPER - A micron screen catches ultra fine grinds in the third chamber and the mini-scraper tool is included for cleaning and to ensure nothing is left behind. MASTERDAM 100% SATISFACTION GUARANTEE! - We stand behind every product we sell. If you aren't completely satisfied, please let us know and give us a chance to address your concerns. We hope to earn your business for a lifetime and won't rest until you're 100% satisfied with your Masterdam Purchase. Buy with confidence! Masterdam 4-Piece Grinder Silky Black Drawstring Bag Pollen Scraper Tool Grinder Care &amp; Use Guide Discreet Cardboard Packaging