1.super tough high speed steel 2.e.g. M2, M2AL, M35, M42, ASP2030 etc 3.with multi- ... Magnetic drills.2. Made of super tough high speed steel., e.g. M2, M2AL, M35, M42, ASP2030 etc. And can be ... , aluminium, cast iron, stainless steel and plastic. multi-ply cutting end edge geometry, to improve removal of chips and keep less ...