1 Chronicles 12:2

right and left-handed, armed with bows, with stones, and with arrows, with the bow from the brothers of Saul, of Benjamin.

Judges 3:15

But when the sons of Israel cried to Jehovah, Jehovah raised them up a deliverer, Ehud the son of Gera, a Benjamite, a left-handed man. And the sons of Israel sent a present to Eglon the king of Moab by him.

Judges 20:16

Among all this people were seven hundred chosen men, left-handed. Every one could sling stones at a hair's breadth, and not miss.

1 Samuel 17:49

And David put his hand into his bag and took a stone from there, and slung it and struck the Philistine in his forehead, so that the stone sank into his forehead. And he fell on his face to the earth.

1 Chronicles 12:29

And the sons of Benjamin, the kindred of Saul were three thousand. And before, the most of them had kept their allegiance to the house of Saul.

Treasury of Scripture Knowledge

Summary

They were armed with bows, and could use both the right hand and the left in hurling stones and shooting arrows out of a bow, even of Saul's brethren of Benjamin.

In hurling

Bible References

Could use

Judges 3:15
But when the sons of Israel cried to Jehovah, Jehovah raised them up a deliverer, Ehud the son of Gera, a Benjamite, a left-handed man. And the sons of Israel sent a present to Eglon the king of Moab by him.
Judges 20:16
Among all this people were seven hundred chosen men, left-handed. Every one could sling stones at a hair's breadth, and not miss.

In hurling

1 Samuel 17:49
And David put his hand into his bag and took a stone from there, and slung it and struck the Philistine in his forehead, so that the stone sank into his forehead. And he fell on his face to the earth.