599-281-10 (.8-1.0" range) shown above. Wrenches and adjusting screw driver are included, but the setting ring is optional.
Made in Switzerland by TESA for Brown & Sharpe. Direct analog readings of bore diameters, using 3-point measurement. This eliminates errors associated with comparator gages such as dial bore gages. Readings are taken directly from the vernier on the thimble, just like a micrometer.
These B&S Intrimik models are available to read diameters from .275" to 12". With optional extensions, the depth of the bore can be as much as 40 inches. Metric versions read from 3.5 mm to 300 mm with a 100 cm depth extension available on larger models.
If you look at the location of the measuring arms in the photo above, you'll notice that it will not be possible to measure to the very bottom of blind holes with this particular model (use the Etalon ingage instead on page 166). For calibration purposes, one setting ring (not included) will be required per tool (see page 163).
Individual gages come in shipping boxes, complete sets in plastic cases. Serial numbers on the gage are suitable for ISO compliance. Factory inspection report is included.
These are of the very best workmanship. Asian made holemikes, available for a fraction of the cost, are no comparison. These Swiss tools can last a lifetime.