Review on Williams 471 3 2 Inch Adjustable Wrench by Jeremy Jackz

Very nice box wrench. Got it to see if it would work with the receiver extension nut (lock nut) that Knights Armament Co. Now uses to mount the receiver/buffer tube extension and end plate to the bottom of the AR receiver. It was tight but I was able to insert the pin into the indentations and tighten the nut securely. It didn't damage the surface or leave any marks. Brownells makes a nice tool for the job that also includes a torque wrench socket. But if you want something cheaper this is a good alternative and it works. It is also a reliable and high quality tool.