|Purchased one of these for my shop. As a gunsmith, it pays to keep at least one of everything - and usually a spare for high demand tools. For it's part, CTD did everything right. Good price, quick shipping. That, sadly, was where the niceties ended. First off, the 3-pt castle nut wrench fits a little loosely on every AR nut I've tried so far; this section's teeth are also overly tapered and slightly under sized. Combine these details and it translates into a two-handed job just to HOLD the wrench on a castle nut... forget about applying any torque yourself. Once I got a friend/minion to apply force on the wrench I learned about its other fatal flaw. We actually started off using the S-curved wrench on a castle nut first, but that part of the wrench actually flexed and warped before the nut popped loose. Not just a little bit, either. With the rest of the lower locked firmly in a gun vise, the distant end of the wrench traversed a good 7-8" while the S-head remained firmly in place. (That's what prompted me to use the other wrench and discover its limitations.) I do not know what this thing is made of, but I watched the tool's black finish turn gray, then silver as the metal flexed into a new shape.
Overall, I am disappointed. This tool is a fine example of poor execution of a great idea.|