Dorex DM80 Heavy-Duty Mortise Lockset – Storeroom Function – Satin ChromeDM80 SS 26D Storeroom function suitable for storage rooms, utility rooms, cash offices and secure areas 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