Crown Brown Canada 420 Grinder Grinders Are All One Solid Piece Of Aluminum, So No Need To Worry About The Blade Plate Coming Loose And Just Spinning In Place. This Classic Design Uses Diamond Cut Teeth To Crush Your Herbs Into A Perfectly Blended Fluffy Consistency, Keeping Your Fingers Clean And Your Bowls Evenly Distributed.The Grip Quality Is Absolutely Phenomenal