I am in the middle of doing engine maintenance, and one project is replacing the timing belt. I got to the point where it required removing the crank pulley bolt. That bolt is torqued to 181 pound feet and is difficult to remove. I did some reading and saw various suggestions on how to remove the bolt...some solutions were to use a long breaker bar wedged against the ground and bump the starter, use a bar wedged into the flexplate or flywheel to lock the engine, use chain wrenches, and purchase ready made tools. The ready made tools cost about $70 and I thought that was too much for a tool I may never use again, so I made a tool. It cost me about $1.60 for two bolts, some scrap steel I had left over from my bumper build, and maybe a half hour of my time.
Here is the tool I ended up with:

It fit on the crank and worked flawlessly

I rested the long end on top of the frame and used a breaker bar and the bolt came right off, not even a struggle! When I put the new belt on tomorrow all I have to do is put the tool back on with it resting on the other side of the frame and I will be able to torque the required value with no problem.