Schlage F51 SIE 626 WKF Wakefield Collection Siena Keyed Entry Knob, Satin Chrome Guaranteed to fit all standard door preps - Depth: 2-3/8-Inch - 2-3/4-Inch - Latch 1-3/8-Inch - 1-3/4-Inch A keyed knob is intended for use on exterior/entry doors that require a keyed lock for enhanced security Inspired designs and lush finishes give you a choice when it comes to making a house your home Quality materials and construction for exceptional security One Tool Installation - installs with just a Phillips screwdriver