3M 22392, Roloc Disc 361F, 24 YF-weight, TR, 3 in, Die R300V, 7000045090 
Insize 3232-3, BLADE MICROMETER, 2-3″, 6928640327612
$270.34
Graduation: .0001″.
Measure the groove diameter of shafts and keyways.
Non-rotating spindle.
Ratchet stop.
Supplied with setting standards (except 0-1″).
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