Standard Abrasives 703654, A/O Square Pad, 2 in x 2 in x 1/2 in, 1/4-20, 80, 7100105433 
Insize 3282-3, DISK MICROMETER, 2-3″, 6928640328107
$167.23
Graduation .0001″.
Measures root tangent length of gear.
Ratchet stop.
Supplied with setting standards (except with 0-1″).
Spindle lock.
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