Anodized Cannabis Grinders Infyniti grinders feature razor sharp diamond cutting blades that provide extreme efficiency. These 4 piece hard top grinders are made of zinc alloy. Infyniti grinders are anodized for a smooth finish and are also equipped with powerful neodymium magnets to help keep them closed. Grinder Features: Size: 2.2" Made of Zinc Anodized for a Smooth Finish Razor Sharp Diamond Cutting Blades Powerful Neodymium Magnets for Incredible Closure Smooth Grinding and No Friction