New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter. Made from high quality HSS steel. 3Pcs Drill Bits + Storage Pouch. (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm）. (3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm). ).
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