Shaped like the AR that it is designed to work on, the AR Flat Wrench from Luth-AR is a versatile and indispensable companion for every firearm enthusiast. This budget-minded multi-use armorer’s tool combines durability, functionality, and ease of use to deliver unparalleled performance. This wrench effortlessly handles a wide range of tasks, including barrel nut installation and removal, castle nut tightening, flash hider installation, and more.