Dynabrade 13507 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 4,500 RPM, 1/2" (13 mm) Dia. Arbor 
Insize 3282-1, DISK MICROMETER, 0-1″, 6928640328084
$130.84
Graduation .0001″.
Measures root tangent length of gear.
Ratchet stop.
Supplied with setting standards (except with 0-1″).
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Insize 4809, U.S. STAND SHEET METAL GAGE, 0-36(.3125~.0070″), 6928640330162
$35.18