Interlock Sliding Door Lock with Recessed Faceplate 
2PT Stainless 45MM SBML Backset (B/S)
Faceplate: 1/2 inch Recessed 

Backset: 1-3/4 inch 45.4mm 
Spindle Hub:15/64 inch 6mm
9 3/8" Long OD Front
1 1/4" Wide OD Front
6 5/8" Long OD Rear
9/16" Wide OD Rear
Color : Black

Markings: US Patent: 5,951,068

NOTE: The lock case without the recessed faceplate is # 191014, the lock cases are interchangeable.

Related 2-point locks
191014  = 2-point with Flat Faceplate , 30mm backset 1-3/16
PS01-0035 = 2-point 1" Recessed faceplate, 45mm backset. 1-3/4
PS01-0036 = 2-point 1/2" Recessed faceplate, 37.5mm backset 1-3/8