" A safe pair of hands "
A reliable person, who can be trusted not to fail in a a task.
When Margaret Thatcher passed the Prime Ministership to John Major she thought he would be a safe pair of hands.
Where did it originate?:
The United Kingdom. An allusion to a cricket fielder who had a reputation for reliably making catches.
Where is it used?:
Worldwide, but more in the UK than elsewhere.
Hear the idiom spoken: