Maxtech Heavy Duty Apartment Entry Mortise Lockset (Like Marks 91A) Satin Chrome 26D (Left Hand ) Surface Mounted plate assemblies - Screw On Knobs with Swivel Spindle. Fits same as Marks metro 91A Mortise knob Lockset. Edge faceplate 1" X 7-5/8" and 2-1/2" backset and 1" deadbolt. Exterior plate 2-3/4" X 10" , Interier plate 2-1/4" X 7". 1-1/8" 5 pin ease to rekey Schlage SC1 key way cylinder with 2 keys