Bumped a big Block Chev over one time to find top dead center and never worked again. The switch is open all the time. Headed for radio shack to get a thumb off/on switch and will make a good remote switch from the scraps of this on. I gave it one star for working one time. We have a trade deficit with China because of substandard quality like this. This every American's fault, including myself, for buying foreign junks and excepting it.