From PathfinderWiki

A knobkerrie, also known as an iwisa, is a Zenj hunting weapon and symbol of authority. The hardwood club-like staff is up to four feet long and tipped with a large knob, and is designed to be thrown end-over-end. Its design and use makes it especially effective against shield-bearing opponents.1


  1. David N. Ross, David Schwartz, and Kaitlyn Sprague. (2014). Ranged Tactics Toolbox, p. 18. Paizo Inc. ISBN 978-1-60125-705-5