Keif Katcher - Best Large 4 Piece Black Aluminium Herb Grinder with Pollen Screen, Scraper, and Kief Catcher - 2.5 Inches This Herb Grinder with Keif Catcher, fits and screw together EASILY, and TIGHTLY Spins Smoothly with no Spill and Perfectly Grinds Herbs Little Effort is Needed to get the Texture you Want, Wastes no Pollen/Kief Easy to Store 4 Pieces With One Thread Our Hidden Kief Filtration Layer With Rugged Grip Lifts Out With Ease, No More Cross Threading.