Simple Tenon Jig

This is a simple tenon jig I made as an experiment, and I was amazed at how well it works. Obviously, the angle is not adjustable, but for simple tenons, this thing is very functional. My table saw has non-standard slots, so I made this to ride against the fence. I used some scraps I had lying around and a clamp I bought at HF for about a dollar. I had to make sure all of my cuts were dead on square, which took some trial and error, but I eventually got it, and it has held up over time.