The ROK GrinderGC has been enhanced to produce even more consistent particle size, with even greater control - teasing out the very best from your whole bean. Simply add fresh coffee beans before hand winding the high precision mechanism to produce grounds suitable for all types of makers. You’ll feel the beans being precisely cut into remarkably consistent grounds. It’s timeless engineering, executed with modern precision, that eliminates wobble and produces grounds as consistent as the most expensive electric grinders. What’s different is the hands-on feeling of the grind.