pair

have a [fine/good etc.] pair of lungs (humorous)

if you say that a baby has a good pair of lungs, you mean that they can cry very loudly. Well she's got a fine pair of lungs, I'll say that for her!

See also: fine, good, lung

a safe pair of hands (British & Australian)

someone who you can trust to do an important job well without making mistakes. He's what this troubled club needs, a good, solid manager, a safe pair of hands.

See also: hand, safe

show someone a clean pair of heels (British)

to go faster than someone else in a race. Butler showed them all a clean pair of heels as he raced for the finishing line.

See also: clean, heel, show