6.1/6.2/6.3/6.4/6.5/6.6/6.7/6.8/6.9/7.0mm Cobalt stainless steel straight shank twist drill Metal iron aluminum alloy drill

6.1/6.2/6.3/6.4/6.5/6.6/6.7/6.8/6.9/7.0mm Cobalt stainless steel straight shank twist drill Metal iron aluminum alloy drill

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