THIS ITEM IS MADE OF SUPER STRONG AIRCRAFT GRADE ALUMINUM. EXCELLENT AND SMOOTH GRINDING GUARANTEED. TEETH ARE RAZOR SHARP. THE SCREENS ARE VERY TIGHT. YOU CANNOT GO WRONG IN BUYING THIS EXCELLENT GRINDER. FEATURES 4 PIECE GRINDER 2.5" WHAT’S IN THE BOX 1 - CANACRUSH 2.5" 4 PIECE GRINDER