23mm HSS high speed steel Drill Bit Hole Saw.High precision, smooth cutting, especially impact resistance, wear resistance.Long life durable and practical. Openings for stainless steel, iron, aluminum, and various types of pipes.Hole drill bit is through a special heat treatment, sharp edge, high strength.for Installing Locks, Knobs in Doors and Cabinets or Drilling Larger Diameter Holes Through Desks Etc.
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