3M 45098, Roloc Disc Pad TR, Soft 1-1/2 in 1/4-20 Internal, 7000045277 
Insize 3232-4, BLADE MICROMETER, 3-4″, 6928640327629
$295.47
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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