Description:

18.5mm Hole drill bit is made of HSS high speed steel. High precision, smooth cutting, especially impact resistance, wear resistance.. Hole drill bit is through a special heat treatment, sharp edge, high strength.. Long life durable and practical. Openings for stainless steel, iron, aluminum, and various types of pipes.. Perfect for Installing Locks, Knobs in Doors and Cabinets or Drilling Larger Diameter Holes Through Desks Etc..