3M 30133, Tapered Spindle Mount Adapter, 7100008859 
Insize 3594-1, DIGITAL NON-ROTATING SPINDLE DISK MICROMETER, 0-1″/0-25mm, 6928640375200
$491.29
Resolution .00005″/0.001mm
Measure root tangent length of gear.
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.
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