This is a standard 13mm drill bit made by Blu-Mol. High speed steel construction with shank size of 3/8". It is used to drill holes in custom vacuum clamping jigs to hold the matrix style ball valves.
I bought these bits a few years ago. They are brand new and unopened but there are areas of tarnish on them.
We are no longer offering these in a retail package as pictured. We purchase them in bulk (on-packaged) to save help you save on the cost.
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