Delaney F Series – MD Style Keyed Entrance Door Leverset Product Technologies: Keyed Entry Function: Delaney keyed entry knobs and levers are able to be locked from the exterior with a key, and then locked or unlocked from the inside with a turn-button. Features: Independent Torsion Spring Removable Through Bolts Concealed Mounting Screws Anti-Friction Latch Retractor Clutch Function Panic Proof – Push/Turn Specifications: Backset: 2-3/4 UL Latch standard, 2-3/8 optionalDoor Thickness: 1-3/8 ~ 2. Adjustable mounting plateStrikes: 4-7/8 ANSI Strike standard (9109)Door Handing: Not required Door Prep: Cross bore: 2-1/8 Edge bore: 1 Latch face: 1-1/8 x 2-1/4 Dummies are surface mounted Latches: Entrance: 2-3/4 (F9070T) standard. 2-3/8 (F9060T) optional Pass/Priv: 2-3/4 (F9073T) standard 2-3/8 (F9063T) optional Faceplate: 1-1/8 x 2-1/4 square corner Bolt: 1/2 Stainless Steel throw. Meets 3-Hr. Fire Rating ANSI & Federal Standards: Meets & exceeds requirements of BHMA/ANSI A156.2 Series 4000, GR1, 800,000 Cycles. Meets FF-H-106C Federal Standard.