EMTEK Breslin Lever Concealed Screws with Disk Rosette Handing not required Concealed Screws(CF) Mechanism. Rosettes have no exposed screws. Door thickness with for CF Mechanism is 1-3/8" to 1-3/4". Specify if thicker. Standard latch is for 2-3/8" backset. Specify 2-3/4" backset if required Sold as complete set. Includes Latch and Strike Plate Lever set supplied with a 28 rotation Latch and dust box. SPECIFICATIONS Emtek Strike Plates for Keyed Passage & Privacy Specifications Emtek Rosette Specifications Proposition 65 INSTALLATION MANUALS Dust Box for Strike Plate Emtek CF Mechanism 2.0 Passage & Privacy - Knob/Lever Installation Guide