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Continue to Chathttps://www.hoffmann-group.com/GB/en/houk/Machining/Drilling/Drills/Jobber-drills/Modular-indexable-drills/DSTR-EC-160-00-171-99-Single-Tube-Trepanning-Drills-with-Outer-4-Start-Thread,-Cartridges,-and-Adjustable-Diameter-(100-328mm-dia-)/p/4841343-