1
general::
Phrase(s): in good hands
Fig. in the safe, competent care of someone. • Don’t worry. Your children are in good hands. Sally is an experienced baby-sitter. • Your car is in good hands. My mechanics are factory-trained.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
In competent or safe care. For example, I know the children are in good hands when they visit my mother. The term good hand has been used in the sense of "skill" or "ability" since the late 1300s.
American Heritage Idioms