Schlage F Series Locks. Standard Duty Residential, ANSI Grade 2. Construction: Engineered for easy installation & durability. Cold rolled steel mechanisms with independent knob & latch springs, all zinc plated & dichromated. Wrought brass and bronze knobs and roses. 1/2” throw deadlocking anti-shim latchbolt. Keying: Five pin “C” keyway. Panic Proof: Inside knob is always free. Installation: Completely reversible for RH or LH doors. Cross Bore: 2-1/8”. Adjustable backset fits 2-3/8” or 2-3/4”. Edge Bore: 7/8”. Door thickness: 1-3/8" - 1-3/4". Packed with round radius latch & strike.