The Magnetic 4 Piece Metal Grinder w/ Catcher uses an array of diamond teeth to shred sticky buds into easy-to-handle granulated herb effortlessly. Taking into account what it takes to make the best weed grinder, the manufacturers of this grinder used top shelf metal that’s durable, hygienic, and easy-to-clean. The weed grinder is easy to put together as well as disassemble for improved maintenance. 30mm