1. Applications: . Our Mortise Locks comply with American National Standard Institute requirement (ANSI/BHMA156.13-1994) grade 1, and have been approved/listed by U.L. in accordance with the Standard UL10B, UL10C and UVC7-2 (1997). We provide multiple models applicable for different demand functions; the above picture has following models. The function features of each model are specified as follows. 2. M1001: . Passage Latch: . Latch bolt retracted by lever from either side at all times. 3. M1022: . Bedroom, Bath Privacy Lock: . Latch bolt retracted by lever from either side unless outside lever is locked by inside thumb turn. . Operating inside lever or closing door unlocks outside lever. To unlock from outside, remove emergency plate and insert a Philips tip screwdriver into the spindle hole then turn it.