The RUKO tungsten-carbide-tipped hole saws can be used in hand and pillar drills. When employing pillar drills, use manual advance only. Suitable for high chrome alloyed steels such as V2A and V4A (up to 2.0 mm), steel and cast steel, non-ferrous and lightweight metals, plastics, reinforced fabrics, plasterboard and lightweight boards, wood processing up to max. 4.0 mm.