6" Mill machine Quick remove release replace Vise Snap Tap Hard Jaw Steel Kurt?

Description

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I am not sure what brands this fits please measure yours
before you bid. It might fit a Kurt vise?
Jaw Dimensions:
.727” x 1.808” x 5.969”
Hole bolt hole size is .316” Just over 5/16
The hole for the bolt head is counterbored to  .787”
Center to center of the holes is 3.866”
It does have a step which is .156" tall and wide