What was distinctive about Ehud, the judge who delivered Israel from Moab?

Answer: He was left-handed

Ehud, a left-handed Benjamite, strapped a sword to his right thigh and drew it with his left hand to strike Eglon.

“And again they cried out to the LORD, and He raised up Ehud son of Gera, a left-handed Benjamite, as their deliverer. So they sent him with tribute to Eglon king of Moab.”— Judges 3:15 (BSB)