Sargent Lever Locksets, Grade 1 and 2Cylindrical lever locksets have solid cast levers and 2-1/4" x 1-1/8" faceplate. Nonhanded. ANSI 115.2 (161) modified door prep. Grade 1 levers have heavy-gauge parts and install quickly. Grade 2 levers have a brass latch bolt for durability. All locksets include 2 nickel silver keys per lock. Grade 1 and 2 are UL Listed for 3-hr. fire door, certified ANSI A156.2 Series 4000 Grade 1, UL and CSA Listed, ADA Compliant, and conform to California Administrative Code Title 19 and 24. Backset: 2-3/4" Strike: 4-7/8" x 1-1/4", ANSI, curved lip Grade 1 door thickness: 1-3/4" to 2" Grade 2 door thickness: 1-3/8" to 1-3/4"Lever Lockset, Cylindrical, Institutional, 10 Line Series, B Style Style, Satin Chrome Finish, Function Storeroom, Keyway Type LA, Grade 1, Material Wrought and Cast Steel, Brass, Bronze, For Door Thickness 1-3/4 to 2 In., Backset 2-3/4 In., Front Size Dimension 2-1/4 x 1-1/8 In., Crossbore Size 2-1/8 In., Key Type Nickel Silver, Number of Keys 2, Pins 6, ANSI 4-7/8 x 1-1/4 In. Curved Lip Strike, Cylinder Yes, Keying Different