Part Number: 4510-36-201-313 Manufacturer: Adams RiteProduct Type: DeadlatchSeries: 4510Grade: 1Faceplate: FlatBackset: 1-1/8”Handing: Right Hand (RH) or Left Hand Reverse (LHR)Strike Size: Mortised 2-5/8” Strike Shape: Flat/Standard JambFinish: Dark Bronze (Duro) FunctionThe 4510 Standard Duty Deadlatch offers flexibility of traffic control during and after business hours. A reverse turn of the key while the bolt is held retracted retains the bolt to allow two-way traffic for hospitals, banks, stores and other buildings which require free entrance at certain times and exit only at other times. Interchangeable, without stile modifications, with any MS1850A or MS1850S Deadlock of same backset and faceplate shape. Does not however, provide the same maximum security as the MS Deadlock. OperationTurn key or operate handle to retract spring-loaded latchbolt. To hold bolt retracted, push it in and secure by reverse turn of key. Uses any standard mortise cylinder with MS dimensioned cam.