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it is part of a Kehoe spline jig. The wooden jig with the slots is for chop saw use in cutting the spline inserts.

Again, thanks to all….
David W

The slots are at an angle si I assume they are for cutting the splines on a table saw.

But that begs the question of how to cut slots with the dovetail bits using the jig.

Which is why I...

The bits do not fit in the slots. I tried, but definitely not enough space for the bits to rotate.

1) It is possible the kit is a rudimentary spline making kit.

2) The two dark pieces of wood were part of the kit - potentially for making splines.

3) The two router bits are potentially for...

Additional photo of router bits previously contained in plastic

This is a genuine query…… (by a puzzled woodworker!!).

I was organizing and uncovered the attachment wrapped in cellophane which includes two router bits. No paperwork so can not identify its proper use. Your assistance is appreciated.

Thanks, David W