Wils Grinder - 4 Pieces (2.5-Inch) Aircraft Grade Aluminum Herb Grinder with Razor Sharp Teeth - Free Velvet Carry Pouch Included 100% Authentic Wils Brand Grinder. 4 piece w/ screen. Unique sharp teeth geometry allow for a fine and consistent grind Large neodymium magnets keep the lid in place, your herbs fresh and the odors in the grinder Stainless Steel Screen W/ tested micron count. Backed by our 100% No Hassle Money Back Guarantee.