Tell Manufacturing CL100051 Light-Duty Commercial Ball Passage Lock Light Duty, Commercial, Tubular Grade 2, Passage Knob, US32D Satin Stainless Steel Finish, Complies With ANSI A156.2, Series 4000, Grade 2, 400,000 Cycles, Tubular Type Construction, Non-Handed, For Use On Interior Or Exterior Wood Or Metal Doors, 1-3/8" To 1-3/4" Thick, Latch, 1" x 2-1/4", Square Corner, 3/4" Housing Diameter, 1/2" Throw, Backset Adjustable For 2-3/8" To 2-3/4", Strike, 1-1/8" x 2-3/4" x 3/32" T Strike, Use 2-1/8" Diameter Hole For Knob 1" Diameter Hole For Latch Bolt, Fits Standard 161 Door Prep, Schlage C Keyway, UL Listed, 3 Hour Fire Rated, 5 Year Warranty. Features KC2900 series Grade 2 cylindrical 2-3/8" to 2-3/4" adjustable backset Product Type: Mechanical Components USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.