Arrow's MLX Series is a robust BHMA Grade 2 Certified lockset. The lockset features a freewheeling lever for abuse resistance, simple four-screw install for quick installation, and has a 10-year mechanical warranty. Features Door Preparation: Cold rolled steel with zinc dichromate finish for corrosion resistance. Latch retractor is precision cast steel. Requires standard 2-1/8" (53.97 mm) bore through doorBackset: 2-3/4" (69.85 mm) backset standard, 2-3/8" (60.33 mm) optional.Door Thickness: 1-3/8" (34.92 mm) to 1-3/4" (44.45 mm) standardLatch: Stainless Steel 1/2" (12.7mm) throw, UL Listed, guarded latchbolton all locking functionsLatch front: 1-1/8" x 2-1/4" for 2-3/4" (69.85mm) backsetStrike: 4-7/8" ANSI (123.83mm)Handing: Non handed Freewheeling LeverExposed Trim: MLX Levers are pressure cast zinc measuring 4-3/4" (120.65mm) in length.MLX Roses are wrought brass 3-11/32" (84.8mm) diameter. Total projection from face of door is 2-17/32" (64.5mm)Warranty: 10 Year Mechanical WarrantyPackaging: 6 per caseCylinder: Solid brass 6 pin, Schlage CS keyway, SFIC and SIC Keys: 2 brass keys Finish: US3, 613E, 26D. Consult factory for the availability of other non-listed finishes. Certification ANSI/BHMA A156.2, Series 4000, Grade 2 Underwriters Laboratories (UL and CUL) listed for use on 3 hour, A label single swinging doors. Federal Specification FF-H-106C ANSI A117.1 Accessibility Code California State Reference Code–for levers returning to within 1/2" (12.7mm) of door surface. ADA/Americans with Disabilities Act: Acceptable Door Hardware: Section 4.13.9 Handles, pulls, latches and other operating devices on accessible doors shall have a shape that is easy to grasp with one hand and does not require grasping, tight pinching or twisting of the wrist to operate. Lever operated mechanisms, push-type mechanisms and “U” shaped handles are acceptable designs.