3M 82455, Roloc Shank, 6 mm 1/4-20 External, 7000045678 
Insize 3241-12, DEPTH MICROMETER, 0-12″, base 3.996_.669″, 6928640326752
$362.19
Graduation: .001″.
Micrometer head accuracy: ?.00012″.
Rod accuracy: ?[.001+.0005(L/3)]”, L is the measuring range in inch.
Rods with flat end.
Ratchet stop.
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