Rim night latchRM015SN, (1):high quality zinc alloy body (2):with five pc brass key,brass cylinder. (3):cylinder 3MM thi. Door lock RM night latch RM015, good quality design.(1):brass cylinder,latch brass.Stainless steel finish design.(2):Special for india market.(3):more and more suitable use in door lock.(4):The key the thinkness is 3MM. 2011 Rim night latch RM015SN