This 4 piece medical grade anodized aluminum grinder from Santa Cruz Shredder is a must have for any avid smoking enthusiast.  It has a diameter of 2 1/8" and features an innovative tooth design that makes it twice as strong with capabilities of cutting in multiple directions.  The unique threading pattern, friction ring, and textured grip makes the grinder more ergonomic and comfortable to use.  This grinder is custom designed in Santa Cruz, USA.