Mortise patch locks for frameless glass doors. GBI Industries creates durable multi-function locksets for glass door applications. With many standard and custom options for function and lever design, these sleek lever sets can be adapted to meet any design aesthetic. These patch locks are built to last. Their unique one-piece body design is much more robust than other patch locks that rely on pressure fitting or clamping. GBI uses components that far exceed the ANSI Grade 1 cycle tests.