After I put it to the test, the flywheel key proved to be highly durable and efficient. Its solid construction and perfect fit only served to further confirm its high quality. The only downside is that it may be a bit expensive for some, but it's definitely worth the investment.
Bought to replace the original key which broke off after an accident on a tree stump. After about two weeks of operation, this replacement key also broke off, albeit with a slight engine stop.
Pros
Fits models: Tecumseh Most engines with electronic ignition
My lawn mower's flywheel key sheared off causing serious misfires. This key was an exact replacement that fitted perfectly. So I pulled out the rest of the old key, put the new one in, and that resulted in the flywheel being in the right place at the right time. Now my lawn mower starts again. You can't ask for more from a flywheel wrench.