Handy Tools – 45 degree jig
I used this shop-made jig while cutting dovetails for 135 degree corners (for making an octagonal box). It's just a piece of 2×4 cut on the diagonal, then glued back together. The piece on the left above slides onto the piece on the right, and then the whole thing goes into a vise to hold the piece you're working on at a 45 degree angle so you can saw on the level while cutting 45 degree angles in things.
I started using it “head-on” but quickly realized it was useful in other directions too.
Not much to it, but as I've discovered in my first couple years of woodworking, 90% of hand tool woodworking is figuring out the work-holding. If you can hold the piece you're working on steady, everything else gets a lot easier, and so it was with this jig.
Thanks for looking!