In your deft hands, a climbing tool becomes a deadly weapon.
Prerequisite: Base attack bonus +1.
Benefit: You treat a grappling hook as a one-handed weapon that deals piercing damage equal to a heavy pick of its size and that has the disarm and trip special weapon features. You do not incur penalties as you would for using a grappling hook as an improvised weapon. If you are proficient with whips and your grappling hook has at least 10 feet of rope or chain attached to it, you can treat it as a two-handed melee weapon with 15-foot reach, though you can use it against foes anywhere within your reach (including adjacent foes), though you don’t threaten any squares with it.
Changing between using a grappling hook as a normal weapon and a reach weapon is a move action. When performing a reposition maneuver with a grappling hook, you can only move the target toward you from its original position.
Pathfinder Player Companion: Adventurer’s Armory 2 © 2017, Paizo Inc.; Authors: Jenny Jarzabski, Mikko Kallio, Isabelle Lee, Luis Loza, Joe Pasini, David N. Ross, and Linda Zayas-Palmer.