Reddit reviews PORTER-CABLE Corner Chisel (42234)
We found 3 Reddit comments about PORTER-CABLE Corner Chisel (42234). Here are the top ones, ranked by their Reddit score.
Used to square the corners of hinge and door lock recessesSelf-aligns for optimum accuracySpring-loaded; 3/8-inches cutter edge for precisionMeasures 2.75 inches in lengthMore efficient than a hand chisel
There's a tool for that
It would not give you a square corner, sorry I wasn't clear about that. You would either have to square out the mortise or round off your tenon, as other posters have mentioned. I am not aware of any router bit that would give you a square cornered mortise.
As far as that video, what he's doing looks completely fine. If you have a festool router and guide (or are willing to shell out ~$600) go for it. Most major brands selling routers will also offer edge guides for their plunge bases as well, of course. This is definitely a reasonable alternative.
The advantage of a template is that all your mortises come out identical to each other. This is really helpful in saving time fussing around fitting your tenons.
EDIT - If you don't feel up to doing it with a chisel something like this can be helpful in squaring out corners.
I'd get a corner chisel, he may have one already but they are great for making the cutouts for hinges on doors and are easy to misplace.