This product does not match the picture but is complete junk. This is the quality you would expect from a $30 60 piece Harbor Freight set. I have several different sizes and they are all made the same way. The threads do NOT go all the way, it looks like they are broken about halfway on the back (this is very rough, not milled). This matrix costs no more than 75 cents, certainly nowhere near the $8 I paid! These return. I knew I wasn't going to get great quality for an $8 matrix, but I was expecting at least an average quality of "good" and not the lowest level of junk I was getting.