Man in the Vault

Man in the Vault is a 1956 film noir about a locksmith, played by William Campbell, who is forced to help gangsters commit a robbery. The screenplay by Burt Kennedy was based on the novel The Lock and the Key by Frank Gruber. The film was the directorial debut of Andrew V. McLaglen.

Now they need a locksmith. A henchman called Herbie is sent to find one. He settles on Tommy Dancer, who works in a bowling alley. Tommy is quickly smitten with Earls girl Betty Turner but is a lawabiding citizen and rejects an offer of 5,000.Tommy falls for Betty, taking her to the Hollywood Bowl and learning she comes from a wealthy family. Tommys attentions to her get him a beating from Louie, another big thug. He is told Bettys face will be disfigured if he refuses to cooperate. ........

Source: Wikipedia