For maximum aroma and flavor retention nothing beats the Infinity Conical Burr Grinder series. Computer controlled special grinding heads cut the angles and shapes of the steel burrs to within 0.1 mm precision (1/250 of one inch). Burrs are produced as matched pairs and are hand assembled in Switzerland for precise fit. The multiple gear motor produces the slowest grinding action (< 450 rpm) resulting in highest precision grinding from Turkish fine to percolator coarse. Lowest noise conical burr grinder.