10PCS 3.0mm- 3.2mm 3.5mm 4.0mm 4.5mm 5.1mm5.2mm5.5mm 6.0mm 4341HSS-CO cobalt drill double-head twist drill for stainless steel

10PCS 3.0mm- 3.2mm 3.5mm 4.0mm 4.5mm 5.1mm5.2mm5.5mm 6.0mm 4341HSS-CO cobalt drill double-head twist drill for stainless steel

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