3" GRAV® grinder made on blue CNC aluminum with three polycarbonate windows, detachable magnetic kief screen, and GRAV® branded scraping tool.The GRAV grinder is 3" tall and made on blue CNC aluminum. The 15 teeth and holes in its upper chamber are well-spaced to prevent clogging. Three polycarbonate windows in the central chamber allow a snapshot of the grinder's contents. Its bottom chamber features a magnetic kief screen that can be removed for easy scraping using a GRAV branded aluminum scraping tool. The edge of the tool is curved to perfectly fit the interior curve of the grinder.