3M 14211, Roloc Disc Pad TS and TSM, Medium 2 in 1/4-20 Internal, 7000045283 
3M 07394 Hookit Disc Pad, 178 mm x 25 mm M14-2.0 Internal, 7000045702 
3M 77737, ROLOC DISC PAD TS AND TSM, EXTRA HARD, 3 IN 1/4-20 INTERNAL, 7010299209 
Insize 1123-200AWL, DIGITAL INSIDE KNIFE-EDGE CALIPER, .8-8″/20-200mm, built-in wireless, 6928640378096
$436.70
Resolution: .0005″/0.01mm.
Measure diameter of deep step holes.
Buttons: on/off, zero, inch/mm.
Automatic power off, move the digital unit to turn on power.
Battery CR2032. Data output.
Made of stainless steel.
Optional accessory: data output cable
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