3M 77737, ROLOC DISC PAD TS AND TSM, EXTRA HARD, 3 IN 1/4-20 INTERNAL, 7010299209 
3M 14211, Roloc Disc Pad TS and TSM, Medium 2 in 1/4-20 Internal, 7000045283 
Insize 3220-3, INSIDE MICROMETER, 2-3″, 6928640328565
$146.09
Graduation .001″
Ratchet stop.
Carbide measuring faces.
Optional accessary: setting ring (part no. 6313), micrometer stand and clamp (part no. 6301 and 6301-1).
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