205 Series HSS drills are suitable for drilling steel, cast steel, alloyed and unalloyed, grey cast iron, spheroidal iron, sintered powder metal, German silver and graphite. Finished with a black oxide coating for aiding chip flow and heat dissipation. Features and Benefits Manufactured form high speed steel for durability Black oxide finish for improved chip flow and heat dissipation Suitable for use with a range of metals including steel and cast iron Standards BS 328, DIN338RN Typical Applications Steel Steel alloys Grey cast iron Spheroidal iron Sintered powder metal German silver Graphite Notes Available in metric sizes 0.4mm - 20.0mm