Sure-Loc Hardware AR101 15 Arapaho Passage Knob Contemporary Series Adjustable 2-3/8 - 2-3/4 backset Fits Doors 1 3/8"- 1 3/4" Thick Sure-Lock Contemporary Series Fits Doors 1 3/8" to 1 3/4" thick Includes mounting hardware and instructions for easy installation Adjustable latches fit standard door preparations at 2 3/8 as well as 2 3/4 Inch