Optimum®+NiTi Gold Single File rotary files are heat-treated The unique heat-treatment technique allows the files to be pre-bent The files offer superior resistance against breakage caused by cyclical fatigue and have no rebound Optimum®+NiTi Gold Single Files are reciprocal They oscillate with clockwise and counterclockwise rotation during each cycleThis helps to greatly shorten the canal shaping time and overall procedure One each size: #15 #20 #25 #35 #45 25mm Assorted pack of 5