Cone shaped grinding burrs made of a hardened steel alloy, precision machined to insure long life and smooh, even miling.  It's adjustable for any desired flour texture from fine to course.  Easily mounts to table or countertop.  Grinds and mills wheat, corn, rice, oats, barley, soybeans, seeds, nuts, shells, peppercorns, peanuts, herbs and spices.  Comes with a 2 year warranty.