Dormer Pramet A720 0.30 mm HSS-E STRAIGHT SHANK MICRO DRILL DIN 1899118 degree 4 facet point helps with self centering and reduces the push force required; Bright finish prevents work piece material from sticking to the cutting edge; Common Shank Size all sizes available on 1mm and 5mm shanks to reduce tool holders; Premium HSCO material can be used for drilling abrasive materials; designed for micro engineering available in sizes from 0. 15mm to 4mm