Dynabrade 52434 3" (76 mm) Dia. Straight-Line Cut-Off Wheel Tool, Front Exhaust, .5 HP, 20,000 RPM, 3/8"-24 Spindle 
Insize 2333-E121, EXTERNAL DIAL CALIPER GAGE, .4-1.2″, 6928640358500
$331.86
Graduation .0005″
Accuracy: +/- .0012″
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Insize 6140, DEPTH BASE ATTACHMENT, suitable for calipers with beam width (w) .630″, 6928640303579
$24.78