‘ Among all this people there were seven hundred chosen men, left-handed, every one could sling stones at a hair breadth and not miss.'
Each unit would have a number of slingers and in all they numbered seven hundred. They slung left-handed and were deadly accurate (compare 1 Chronicles 12:2 where they were also Benjaminites, but ambidextrous). The sling was composed of a piece of cloth or leather, a cord going from each side. The stone was put in the piece of cloth and the two cords held by the end and whirled round the head. Then one cord was released at the right moment and the stone sped to its target at deadly speed. The Benjaminites had perfected slinging into an art of war. Having men with such expertise may have boosted the confidence of the Benjaminites, and is mentioned to explain their later victories.