8.1/8.2/8.3/8.4/8.5/8.6/8.7/8.8/8.9/9.0mm Cobalt stainless steel straight shank twist drill Metal iron aluminum alloy drill

8.1/8.2/8.3/8.4/8.5/8.6/8.7/8.8/8.9/9.0mm Cobalt stainless steel straight shank twist drill Metal iron aluminum alloy drill

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