Performance Complies with ANSI A156.2, Series 4000, Grade 2 400,000 cycles, UL/ULC listed for 3 hour fire door, ANSI A117.1 American Disabilities Act (ADA), Chassis Tubular, Lever Non-handed, solid cast, Latch 1 x 2-1/4, square corner faceplate, 1 housing diameter (stainless steel), 1/2 throw Rose 3 diameter, Backset Adjustable 2-3/4 or 2-3/8, Finish US26D Satin Chrome, Strike 1-1/4 x 4-7/8 square corner, ANSI ASA Strike, Cylinder Standard Schlage (SCC) - 6-pin solid brass, C keyway, keyed different (KD), Keys Two nickel silver, Door Range 1-3/8 to 2, Door Preparation 2-1/8 diameter for lever, 1 diameter for latch bolt. Fits standard 161 door prep Grade 2 - 400,000 cycles UL/ULC Listed Fits standard 161 door prep Standard cylinder Schlage (SCC) - 6-pin solid brass