I help repair clothing by repeatedly stabbing it.

I sound like corn but I'm louder Used by clowns they couldn't be prouder Found on cars, bikes, and trains Think real hard you know my name.

I come out on special occasions, You stand around me for celebrations. Not always accompanied by a song, There's no way you can slice me wrong.

In the heart of the door, I gleam with might, like a leprechaun's gold in the dark o' night. Turn me once, and luck shall sprout, unlockin' secrets with a merry shout!

Required for living, though very few actually like this activity. However, if passion one does possess, they will never have to do this a day in their life...