Tell Manufacturing CL101704 Light-Duty Commercial Store Room Knob, Satin Finish Light Duty, Commercial, Tubular Grade 2, Store Room 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, Includes 2 Nickel Sliver Keys, 5 Year Warranty. Features Tubular construction and non-handed UL listed for a 3 hour fire door Adjustable 2-3/8" 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.