Marking Bird's Mouth Cuts

angle. You can draw that angle over and over again because you made your own jig and it stays in that position until you're done with it. Now, Chris, you carpenters love to you to do our own bird's mouths, too. We like to set those rafters flush on the wall. Here's the perfect jig for a bird's mouth over and over and over. If you want to go, if you want to do a step up from the bird's mouth, do a step up to our 12-in Smart Square Pro. Also has the movable fence.