Easily remove the crankshaft bolt on a Mazda MX-5 NA or NB engine with this crankshaft wrench.

The crankshaft bolts on an MX-5 can be extremely tight, and using an air wrench for removal and installation isn't a good idea due to the notorious pulley wobble. With this tool, you can easily block the crankshaft after removing the crankshaft pulley and loosen the bolt with hand tools. Once you've finished replacing the timing belt, you can also use it to tighten everything to the correct torque.
In short, a very valuable tool that makes replacing the timing belt on a Mazda MX-5 many times easier.
Below is a short video about how the blocking key works.

https://lucacarmods.com/wp-content/uploads/2019/12/crank-locking-tool-mx5.mov