FTAGH Knife jig for 6" planer

[Deadeye]

I *think* this is the knife-setting jig for a 6" planer I had years ago? If it is, would you like it?
If it's not and it's a key accessory to something else I might still own, could you enlighten me?!

 

[Essex Barn Workshop]

Looks like what you describe, a straight knife setting jig. Still have mine!