Ceramic Vs. Steel Burr Grinders Know Your Grinder
#0183;#32;Burrs can either be conical or flat. Both shapes are available in either ceramic or steel. Burr grinders enable you to control the fineness of you coffee grounds. You adjust the grind by moving the burrs closer or away from each other. Fineness of the grind determines the rate of flow of water. When making espresso, you need a grind that is fine enough.