[ SOLID & STURDY CONSTRUCTION ] : Crafted with premium zinc alloy, our 4-layer 3-chamber designed herb grinder ensures optimal grinding performance and exceptional durability.【Attension】Could not grind fresh herbs or hard sharp things. [ EFFICIENT GRINDING ACTION ] : The 30 razor-sharp metal teeth on the first layer and the 24 razor-sharp teeth on the second layer ensure smooth twists and efficient grinding action. The thin poly ring adds extra smooth grinding without making annoying metallic sound. [ ULTRA STRONG MAGNET LID ] : The ultra-strong magnet lid holds the second layer firmly in place to guarantee tight closure during grinding. The especially designed textured grooves on the first and bottom layer enable you to gain more control of the fineness of the grind. [ MESH SCREEN & POLLEN SCRAPER ] : The metal fine mesh screen filters well; it helps separate the finer particles from the chunky herbs. The included pollen scraper helps collect the small and fluffy herbs and clean the leftover herbs. [ COMPACT & PORTABLE ] : Featuring compact and portable (2”x 2” x 1.4”), this zinc alloy herb grinder is easy for carrying and storage. This herb grinder with pollen screen enjoys 45 days money-back and 12-month worry-free warranty.