Bluedeal 4-20mm Large HSS Steel Step Cone Drill Countersink Titanium Bit Set Hole 4-20mm Large HSS Steel Step Cone Drill Countersink Titanium Bit Set Hole
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4-20mm HSS Steel Titanium Step Drill Bits Step Cone Cutting Tool Core Drill Bit Steel Woodworking Wood Metal Drilling Step Drill Paczo Step Drill 4-20mm, High Speed Steel Titanium Coated Step Drill Bit Hex Shank Power Tools HSS Professional Pagoda Drill High quality material - The step drill is made of high speed steel with high hardness and good wear resistance.
