This tool was made to loosen the crankshaft pulley on a 1.8 Mazda FP engine used in (1999-2000) Proteges.
The pulley needs to be held by a tool bolted to the pulley using two M8x1.25 bolts.
I used a couple of flat bars from 2 Harbor Freight ratchet bar clamps ($2 each!) to make the tool.
The short bar is about 6 inches long.
I used the $50 OTC 4754 universal pulley holder as an inspiration to make the tool.