The 10 Series rim exit device is super-heavy-duty panic and fire exit hardware for use on all types of single and double doors with mullions. The patented mounting plate and strike locator system ensures the easiest and most accurate installation of panic hardware available. The 40 Series rim exit device is super-heavy-duty panic and fire exit hardware for use on all types of narrow stile single and double doors with mullions. The patented mounting plate and strike locator system ensures the easiest and most accurate installation of panic hardware available.