A Miter Bar is a device that slides into a recessed channel. They are normally used to allow jigs or other things like feather-boards, clamps, etc, to slide freely next to the saw/router/drill.
This one was specifically designed for my craftsman Tablesaw, and allows the insertion of a fastener to also attach to your jig or device.
This is a work-in-progress.
To-do: Relief-Cut for expanding-clamp (Done)
To-do: Create tapered cut-out so when fastener is tightened, bar expands and "locks" in the miter-slot.