Product review (5 stars): I have a lot of tools and a machine shop and expected this to be easy..
Factory fit, but a real pain to change out. Make absolutely sure you get the special wrench for changing this out. I have a lot of tools and a machine shop and expected this to be easy... it wasn't. After fighting with it for a day, I went back and ordered the little wrench. Once that arrived, the swap took about 2 minutes.