ND91PD: Entrance/Office LockCATALOG ND91PD Entrance Office Lock Push button locking. Push button disengages outside lever until unlocked with key or by turning inside lever. Available Styles: RHO Available Finishes: 613, 626 Standard Features Certification: Exceeds ANSI A156. 2, Series 4000, Grade 1, UL Listed for 3 hour fire door. Meets A117. I Features: Tested to exceed three million cycles Latch: 1 1 8 x 2 1 4, Square corner faceplate, 1 housing diameter, 1 2 throw Strike: 1