Things-Catcher

This two-handed pole arm has a large, tong-like head lined on the inside with spikes. Designed to be thrust around the torsos and extremities of foes, these weapons can immobilize creatures of nearly any size. Clan Moulder is the only Skaven clan to use things-catchers on a regular basis, though they are also employed by warbands that are sent to fetch slaves or prisoners.

Source

 * Warhammer Fantasy RPG 2nd ED -- Children of the Horned Rat
 * pg. 74