Mendo Mulcher Billet Aluminum 4 Piece Grinder with Screen (1.75 Inch (Mini), Aluminum) Crafted in Mendocino County, California USA Heavy Duty Aircraft Grade Billet Aluminum (6061-T6 Bar Stock) Lifetime Warranty. Easy to Clean. Minimal Maintenance. Twice the number of grind teeth over the competitive grinders. Solid. Built Like a Tank. Possibly the Last Grinder You Will Ever Need.