UL listed for fire exit hardware. Devices are ANSI A156.3 - 2008 Grade 1. The EL-99-F device has a grooved mechanism case. The rim device is non-handed except when the following device options are used: -2 (double cylinder) or SS (signal switch). The 299F strike ships standard. The EL feature allows for the remote unlatching of exit devices, alternative to manual dogging.