The Piranha Aluminum Grinder measures 2.5 inches wide and is comprised of 4 pieces. This model has holes in the base of the grinding chamber to automatically drop shredded material into the storage compartment, as well as a sifting screen and pollen chamber in the base. The first 2 pieces are kept securely together by the central magnetic connection. Piranha as a brand prides themselves on creating top-notch session equipment, including these grinders that utilize "razor sharp teeth" to achieve your ideal shredded consistency. The friction ring at the outer top edge helps you keep a better grip when the grinder is all loaded up. Each grinder includes a canvas carry pouch with a drawstring closure for easy stashing and on the go use.