DIY Supplies: MetalworkingType: Core Drill Bitlength: Step Drill BitUse: Metal DrillingModel Number: Step Drill Cone Cutteris_customized: YesMaterial: High Speed SteelMaterial: HSS Core Drill BitPackage: 3 x HSS Power Tools4-12mm: 4, 6, 8, 10, 12mm4-20mm: 4, 6, 8, 10, 12, 14, 16, 18, 20mm3-12mm: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a