...the Rear Sight Mounting tool. Seriously, I cannot believe that they had the audacity to put the name "Glock Perfection" on the side of it. After doing the armorers class, I bought the tool from one of my vendors to have the handle cam out while trying to install a set of Trijicons and not get the sights on at all. I called Glock and asked what I was doing wrong. The answer: Nothing. The solution: Send it back and we'll give you a refund. Spoke with the director of training and the response was: We know plenty of people are having problems and we sell the tool anyways. There's nothing we can do. Unreal. Anyone else having problems with this thing?