4pcs metal Drill Bit Set 3PCS HSS High Speed Steel Titanium Hex Shank Step Drill (3-12mm4-12mm4-20mm)

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.Notes:High-speed steel, high quality with good durability for you to useProfessional drill for deburring, chamfering, elliptic hole enlargementSuitable for punch holes through sheet metal, steel plate, aluminum plate, brass or woodType 1 :(3pcs)1 x Drill Bit 3-12mm1 x Drill Bit 4-12mm1 x Drill Bit 4-20mmType2:(Center Punch)1pcs Automatic Center PunchType 3:(3-12mm)1 x Drill Bit 3-12mmType 4:(4-32mm)1 x Drill Bit 4-32mm