Emtek Knob 2-3/8" and 2-3/4" Backset Single Cylinder with 5-1/2" Center to Center Quincy Keyed Sideplate Lockset for 1-1/4" to 1-3/4" Door - ReversibleEmtek Knob 2 3 8" and 2 3 4" Backset Single Cylinder with 5 1 2" Center to Center Quincy Keyed Sideplate Lockset for 1 1 4" to 1 3 4" Door Reversible The Emtek Knob 2 3 8" and 2 3 4" Backset Single Cylinder with 5 1 2" Center to Center Quincy Keyed Sideplate Lockset for 1 1 4" to 1 3 4" Door Reversible is an Emtek door hardware product configured with available finish and option variants. Shared product specifications apply across available variants.