Dynabrade 92118 1/4" W x 12" L 180 Grit A/O DynaCut Belt, 50/pack 
Dynabrade 78320 3" Dia. x 1" W x 1/4" Shank, Medium, NWN DynaBrite Wheel, 10/pack 
Insize 3294-4, NON ROTATING SPINDLE DISK MICROMETER, 3-4″, 6928640375514
$368.25
Graduation .0001″.
Measure root tangent length of gear.
Non-rotating spindle.
Ratchet stop.
Supplied with setting standards
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