Dorex DM10 Heavy-Duty Mortise Lockset – Passage Function – Satin ChromeDM10 SS 26D Passage function suitable for non locking 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 latchbolt with 3 4 throw