Heavy duty cylinder mortice locks from Gainsborough Hardware Industries | Architecture & Design
29 Gainsborough Tri Lock rekey info. - YouTube
Ultra Hardware 85988 Gainsborough Whitehall Passage Door Knob, Brass - Passage Door Handles - Amazon.com
Bed/Bath Pocket Door Lock and Pull Contemporary Entry Square Privacy Door Lock Recessed 2 Sided Invisible Sliding Door Locks Hardware for 1 3/8 Inch to 1 15/16 Inch Thickness Door - Walmart.com
Gainsborough TriLock Series - Central Screens & Locks