Extension handle for a Starrett solid-rod inside micrometer set

[Toolmaker51]

Imagine being so highly placed in a specialized market; yet confident enough to publish blueprints.
There are some people not so impressed with Starrett; however those individuals haven't nearly 140 years in business.
Here is offered what I regard as the best metrology house for calibrations and repairs, Long Island Indicator at 027 : Long Island Indicator Service : Sales, Repairs and Spare Parts
Of all the text the site holds, the backdrop is always quality.
And none exhibit this more pointedly than "What has ISO got to do with it?" on page 002 : About Standards and Specifications

Imagine being so highly placed in a specialized market...