Lockpicking- Cross Lock Pick

While cross (a.k.a. cruciform) locks may not be the most common here in North America, they do appear from time to time.

  One of the most typical places they are encountered tend to be the override lock on many hospitality safes in hotel rooms. 

 

And elsewhere in the world cross locks are very popular, appearing frequently in Asia, South America, and many parts of Europe. 

While cruciform jigglers (the classic "blue head" key) can often open such locks, a proper cross pick tends to be more effective.