Von Duprin 99EO Rim Exit Device from the 99 Series for 3' Wide Doors, Satin Chrome Finish Rim mounted exit device for all types of single and double doors with mullion UL Listed for Panic Exit Hardware Mechanism case designed with interlocking channel and push bar that bottoms out without damaging internal parts Deadlocking latch bolt with 3/4" throw Features hydraulic damper for noise reduction