Extra Pair Of Hands Meaning

(idiomatic) The assistance of another person.

Example: 1970 Margaret Clark, Health in the Mexican-American culture: a community study, University of California Press, p159
  Compadres visit each other frequently, usually several times a week, and assist each other with labor whenever an extra pair of hands is needed.
1999 Melina Marchetta, Looking for Alibrandi, Scholastic Inc., p165
  We needed an extra pair of hands. So Marcus Sandford became our extra pair of hands.
2008 Amy Jean Peters, How to Start a Home-Based Children's Birthday Party Business, Globe Pequot, p118
  Do you need an extra pair of hands to help you pass out slices of cake and to clean up after the party is over?