This premium herb grinder is constructed from durable aircraft grade aluminum and boasts a sleek, flower-shaped tooth pattern for a uniform grind. A built-in storage jar with an airtight lid and o-ring seal ensures freshness for moisture-sensitive items while on the go. The Ongrok 5 Piece Flower Petal Grinder features a quarter turn locking function and powerful neodymium magnet to securely hold chambers in place until you're ready to use. Additionally, a removable screen allows for easy cleaning and maintenance.