I'm not sure that removing the crank bolt is even possible to do without a tool like this. If you don't have this on the crank will just keep spinning. It also seems pretty ridiculous that car manufacturers have 134 ft lbs holding that bolt on. I broke 4 extensions the first day and couldn't get it loose. The second day I put the breaker bar on with no extension and only a deep well socket, grabbed on real tight to the front bumper with my hands and used my foot on the breaker bar, it finally broke loose!