Question about Starrett Jobbers Drill Gage Gauge No. 187 1/16"-1/2

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How to use?

How to use of jobber drill gauge? when need to check?

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It is used to check either the size of a drill bit or to see what size fastener you have and decide what size bit to use. Just insert a bit or fastener into a hole. It should fit snugly and if it doesn't fit the next smaller sized hole then you now know what size you have.

Posted on Mar 07, 2012


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