Dynabrade 11395 Guide Wheel 
3M 77737, ROLOC DISC PAD TS AND TSM, EXTRA HARD, 3 IN 1/4-20 INTERNAL, 7010299209 
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