Answer:
Tear one off and scratch my head, what once was red is black instead!
One might hang a locket from this
Used to keep prisoners silent and to make temporary repairs on cars.
What has hands but canβt clap?
A squiggly line tells you when you've done it wrong
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.