Ketsu Onyo's staff was a multi-functional weapon wielded by the bounty hunter named Ketsu Onyo.
The staff was employed for hand-to-hand fighting using the vibro-ax blade attached to its end, but it also served as a blaster for engaging targets at a distance. Onyo utilized the staff on the planet of Garel to defeat a group of stormtroopers along with their sergeant.
The vibro-blade at the tip could be detached and swapped out for different blade edges, darts, laser scopes, or supplementary blaster components.