The Plumbing Wizard
If you are replacing a toilet, or faucet, and it has this type of shutoff, it will need to be replaced.
Anytime we see these, they get removed.
If you attempt to rebend the corrugated copper tubing, it can crack or break.
If it leaks while you are gone, it could create lots of damage.
These are new replacements.
The one on the left is compression for copper pipe
The one on the right is an iron pipe stop with a brass nipple.
Do nut reuse a shutoff like this. Major damage can happen.