The Large Crank Grinder is one of the best grinders on the market. It has a 2.5 inch diameter and will fit in your pocket easily, or bag for easy travel. The crank handle makes grinding easier than ever, and the acrylic top allows you to see all your herbs as they are ground into a fine powder. The pollen screen catches any pollen that comes from grinding, so you don’t have to worry about it getting everywhere!