The best tool to use is your credit card.
Once the shank is bent and semi straightened it will bend even easier next time. If you know you will be anchoring in rock/rubble then a wreck anchor with straightenable tines is the way to go, but it won't hold squat in sand or mud. If you have a valuable anchor and know you are going to anchor in an area known for hangups and don't want to cut it off, then using a crown pendant and bouy is the best answer.
Be careful when you are in the Keys when anchoring. The fish cops can ticket you, I believe, if they see you anchoring on a live reef. Might be worth some research.