3M 77737, ROLOC DISC PAD TS AND TSM, EXTRA HARD, 3 IN 1/4-20 INTERNAL, 7010299209 
Insize 3127-E1, DIGITAL THREE POINTS INTERNAL MICROMETER, .8-1″/20-25mm, 6928640356322
$894.20
Resolution .00005″/0.001mm.
IP65 dust/waterproof.
Buttons: on/off, set, inch/mm, ABS/INC.
Data output.
LR44 battery, automatic power off.
Ratchet stop.
Optional accessary: data output cable, setting ring (part no. 6313), micrometer stand and clamp (part no. 6301 and 6301-2).
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