Dummy Lock: Non-functional, without latch, just like a door handle, usually for hall and pantry door. There is a panel behind the knob. For installation, holes need to be punched through the door. Crystal Style Door Lock clear Glass Door Knobs, classic rose made from heavy zinc alloy, Confirm with ANSI Grade 3, exceeds 200,000 cycles, Fully reversible, suitable for both left handed and right handed doors.