What is this Pinnacle item?

[zachjowi]

I found these two Pinnacle parts in a tool box but am not sure what they are. I am thinking concealed hinge jigs of sorts but not sure and couldn't find them anywhere. I know Pinnacle was Woodcrafts house brand. There are 4 adjustment screws on both faces and I think the two brass thumb screws might be for a track?

 

[jimbo51]

They are holders for a slotted fence. The holes are for MagSwitch clamps.

 

[zachjowi]

They are holders for a slotted fence. The holes are for MagSwitch clamps.

@jimbo51 I never would have thought of that but I could see how it would work. Do you know if it would have came with a fence? I only saw these in the drawer. Thanks