.5pcs Hss drill hole bit Size: 16mm/0.62" , 18.5mm/0.72" , 20mm/0.78" , 25mm/0.98" , 30mm/1.18".
.High precision, smooth cutting, especially impact resistance, wear resistance.
.Perfect for installing Locks, Knobs in Doors and Cabinets or Drilling Larger Diameter Holes through Desks.. etc.
.Cuts quickly, Openings hole for stainless steel, iron, aluminum, and various types of pipes.
.It has gone through a special heat treatment, sharp edge, high strength.