What did Clint Eastwood use to get into the bank safe in Thunderbolt and Lightfoot?

Clint Eastwood's character, Thunderbolt, didn't actually get into the bank safe in *Thunderbolt and Lightfoot*. He used a combination of deception and intimidation to get what he wanted.

Here's how it happened:

* He didn't use a key or any technical means to open the safe.

* Instead, he used a fake grenade and his intimidating presence to convince the bank manager and a teller to open the safe.

* He forced them to place the money in a bag.

So, the key to his success wasn't a fancy tool, but his ability to bluff and play on people's fear. It's a classic Eastwood move, showcasing his iconic blend of toughness and cunning.