Wholesale Power Tools Accessory Product Specification ITEM#D116003 Product NameHss Step Drill Bit TypeCountersink Drill Bit, Step Drill Bits ShankTriangle Shank, Round Shank, Hex Shank, Hex Shank With a Step FluteStraight Flute, Spiral Flute ColorDesigned Customized supportOEM/ODM Brand NameDURAMAKE Place of OriginHangzhou, website:http://www.dawningtool.com/power-tools-and-accessory/power-tools-accessory/