This is a CNC-machined, 4-pc. Matrix Grinder and due to its grooves on the edge of lid & base a very good grip can be maintained, while crushing herbs. It has a visually elegant design. It has an protective anodised coating, so that hashish resin can be crushed easily. The Matrix arranged block teeth are surrounded by extra large oval and teardrop shaped holes shaped holes for the crushed herbs to fall through. The Pollen screen is cleanable, once the top & bottom has been unscrewed and to assist with cleaning further, a plastic scraper is also included. The top is held fast with the use of a magnet. This Matrix Weed Grinder is decorated with an understated 'BL' logo (' Black Leaf ') on the lid.