.Step Drill Bit 2 Spiral Groove Pagoda Hole Reamer HSS Cobalt Drilling
--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n--\n\nFeature: \n 1. HIGH SPEED STEEL MATERIAL: Step drill bit is made of high speed steel material, possess longer service life\n2. CUTTING AND SMOOTHER: Adopt double cutting design, cutting and smoother, bring high working efficiency\n3. ADVANCED DOUBLE SPIRAL GROOVE DESIGN: The advanced double spiral groove design is better than the straight groove design, which prolongs the service life of the drill bit\n4. DRILLING AND REAMING: Suitable for drilling and reaming operations of 304 stainless steel, carbon steel, iron plate, aluminum plate, copper plate, plastic plate, etc.\n5. 4\u201132MM DRILLING DIAMETER: Come with 15 steps sizes, drillable diameter from 4\u201132mm, one step drill bit meet all your requirements \n\nSpecification: \n\nItem Type: Step Drill Bit\nProduct Material: High speed steel (contains cobalt)\nDrillable Diameter: Approx. 4mm / 0.16in\n6mm / 0.24in\n8mm / 0.31in\n10mm / 0.39in\n12mm / 0.47i-
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