6Pcs HSS Titanium Step Drill Bit Set Multi-Size Metal and Wood Hole Cutter Tool

Suitable material: Workpieces with general hardness, such as wood, plastic, PVC plate, iron plate, plate thickness within 3MM. Please note that stainless steel and spring steel are not applicable. Not for quenching.High-speed steel, high quality with good durability for you to useProfessional drill for deburring, chamfering, elliptical hole enlargementSuitable for punch holes through sheet metal, steel plate, aluminum plate, brass or woodPackage includes:(6pcs)1 x Drill Bit 4-20mm1 x Drill Bit 4-32mm1x3mm saw drill bits（Automatic Center Punch）1x6mm saw drill bits（Automatic Center Punch）1x8mm saw drill bits（Automatic Center Punch）