Advantage EA Series | Grade 2 Entrance Knob | US3 Features SC4 6-pin Standard Concealed Mounting Screws 1 Piece Bulging High Security Knob Fast and Easy Installation Panic Proof (inside always free) ANSI GRADE 2 ANSI/BHMA A156.2-2003 Series 4000, Grade 2 Exceeds 400,000 cycles 3 hours Fire rating UL10C/UBC 7-2(1997) Positive Pressure Rated Specifications Door Fitting 1-3/8” ~ 1-3/4” door thick. 2” door thick optional. Exposed Trim Wrought brass or stainless steel. Lock Chassis Heavy gauge dichromated steel. Cylinder Solid brass SC4 6-pin standard. Latch 1/2” throw stainless steel latch bolt. 2-3/4” backset-1-1/8” x 2-1/4” faceplate mortise latch Drive-in latch available. Strike T-Strike standard (9106). Screws Combination screws for both metal and wood doors. Keys 2 brass keys per set. Availability-7 days FAQs 1) What are Gatehouse key blanks used for?Gatehouse key blanks are uncut, pre-profiled keys designed to work with Gatehouse lock cylinders, commonly found on residential doors. Locksmiths use these blanks to create precise duplicates or replacement keys by cutting them to match a specific lock bitting. 2) Is the EA Series entrance knob easy to install on existing doors?Yes, the Advantage EA Series knob is designed for easy installation, fitting standard 2-3/8″ or 2-3/4″ backset door preparations. It comes with all necessary mounting hardware and follows ANSI/BHMA Grade 2 standards, so you can install it yourself with a screwdriver in less than 10 minutes.