Dynabrade 53533 Cone or Plug Grinder (Triple Extension) 
Insize 3532-100E, DIGITAL BLADE MICROMETER, 3-4″/75-100mm, 6928640355707
$672.39
Resolution .00005″/0.001mm.
Measure the groove diameter of shafts and keyways.
Non-rotating spindle.
Button function: on/off, set, inch/mm, ABS/INC
Data output. LR44 battery, automatic power off.
Ratchet stop.
Supplied with setting standards (except 0-1″/0-25mm).
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