MUMU Hss Step Drill Bit 10-45mm Spiral Groove Triangle Handle Nitrile Pagoda Tail Drill Bit with Drill Bit Black

High-speed steel: suitable for workpieces with a hardness of less than 25 mm, such as: B. Carbon steel, sheet metal, insulation boards, PVC panels, boards and wood with a thinner thickness up to 5 mm made of heat-treated, forged high-speed steel (HSS) with titanium nitride coating for longer service life. Good design - The triangular shaft holds the power tool chuck securely and prevents slippage. The double-edged design removes chips faster and allows particles to escape more easily. You can cool it with water when it works and it can be used even longer. A necessity for the family , DIYers or Professionals - Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper and many other types of sheet metal.