Performance Grade 2 rated – 400,000 cycles with a Grade 1 Chassis for added performance, complies with ANSI A156.2, Series 4000, UL/ULC listed for 3 hour fire door, ANSI A117.1, American Disabilities Act (ADA), freewheeling clutch (added security from hammer attacks), Lever Non-handed, solid cast, Latch 1-1/8 x 2-1/4 faceplate, 1 housing diameter (stainless steel), 1/2 throw, Rose 3-1/2 diameter, Backset 2-3/4, 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 with thru-bolts