Finish carpenters: selling two Templaco 6' 8" door hinge router jigs for 3.5" and 4" hinges.
Like this: https://www.templaco.com/html/template_base.asp?id=213
Also comes with the 5/8” router template guide that fits the jig (takes the ½” hinge mortising bit).
How to use: https://www.templaco.com/html/how_to.asp?how_to=full_length
Easy to use. Excellent results!
New, this costs $165+tax,