Dorex DM50 Heavy-Duty Mortise Lockset – Entry/Office Function – Satin ChromeDM50 SS 26D Entry office function suitable for office and storage room applications Architectural quality for heavy duty commercial and institutional applications High quality satin chrome finish For 1 3 4 2 door thickness conversion kit available for doors up to 2 1 4 thick 2 3 4 backset Handed field reversible Thru bolt mounting sectional trim with concealed mounting screws 2 7 16 diameter rose Lever length is approximately 5 Brass two piece