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5/10pcs M42 Cobalt Drill Bit Set 0.5-10mm for Drilling on Hardened Steel, Cast Iron and Stainless Steel (Color : A, Size : 4.5mm 10pcs)
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HSS Cobalt Best Drill Bits for Hardened Steel - China Best Drill Bits for Hardened Steel, 16mm Drill Bit | Made-in-China.com
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