Spiral Step Drill, HSS-XE, 4 to 20 mm, 9 Steps

The Karnasch Professional step drill made of HSS-XE steel and spiral fluted with split point. Karnasch STEP DRILLS are designed to drill perfectly round holes in sheet metals of an thickness up to 4 mm. The transition from one step to the next perfectly deburrs the previously drilled hole. Step drills are therefore a drilling and deburring tool combination. This versatile tool combines 9 different drills with diameters of 4 - 12 mm. The radius transition simultaneously bezels or deburrs the bore holes. The drills are axial-radially relief grounded and can be resharpened at the tooth face. Made of high-alloyed special steel XE for considerably longer service life than HSS-Steel. The deep-ground flutes with 3 cutting edges guarantee extremely smooth running, noticeable softer cutting and high cutting performance. Excellent for thin sheet metal.