The Wrench is a supercharged castle nut wrench. It has many of the features of the scraper tool in the Original O.S.T. 2.0. It scrapes carbon from the BCG, the neck of the bolt, firing pin, and locking lugs. It functions as a screw driver bit slot, O2 canister wrench and mini pry tool.
One of the most unique attributes about the Wrench is that it was designed to be secured to a single loop of MOLLE webbing. A durable shock-cord is attached to the Wrench to keep it handy. Simply feed the Wrench handle into a single loop of MOLLE webbing, stretch the cord around the handle and let go. To use the wrench simply grab the top of the wrench and pull.