Grayling's flat back collection are what the industry refers to as "threadless ends" or "threadless flat backs." You may also see these referred to as "snap in" or "push in." Our flat backs are threadless, which means they do not have internal or external threading to secure them. They snap into place and are held secure by the tension created by bending the post on the front end. So long as your flat backs don't require screwing or twisting the front piece into the back they should be compatible with our backs. See this article for how to securely bend your post and insert your flat backs.
This is important to know if you're planning on purchasing a set of our Titanium Flat Back Stud Replacement Posts for flat backs not purchased at Grayling.
Our flat backs are not compatible with internally or externally threaded flat backs.