Some of you might laugh at this. So I bought a single point sling piece for my ar. I had bought a stock wrench at the last 1500,and I tried to loosen the castle nut ,big fail lol. Thinking I did something wrong I go to youtube looking for some vids to see if I did,I did. In the first vid I watched the guy said for the love of god dont buy a wrench like this and think your going to get the nut loose. Which was very close to the wrench I had,then he showed the recommended wrench. Feeling stupid and not wanting to spend more money on buying and shipping the proper wrench I made my own. I went to homedepot bought some strip steel and used my jewelry saw and cut it out worked like a charm.