The Brinks Commercial Light Duty Passage Knob is for doors that do not require locking. The door knob is equipped with a tubular chassis and is designed for commercial or residential applications such as hallways, entryways and closets. The knob fits doors 1-3/8-in to 2-in inch thick. It has a 3 hour UL fire rating and meets ANSI Grade 2 standards. Brinks Commercial is the pro's choice for commercial door hardware. Equipped with tubular chassis Fits 1-3/8-in to 2-in thick doors with an adjustable latch that fits 2-3/8-in or 2-3/4-in backset Meets ANSI Grade 2 standards and has a 3-hour UL fire rating Tested to exceed 500,000 cycles Non-handed/Reversible Color/Finish Family: Black Hardware Finish: Matte Manufacturer Color/Finish: Matte Black Type: Passage door knob Backset Size: Adjustable Bore Size: 2-1/8-in Fits Door Thickness: 1-3/8-in to 2-in Projection Measurement: 2-in Antimicrobial: No Commercial/Residential: Commercial For Use with Bed/Bath: No For Use with Entry Door: No For Use with Hall/Closet: Yes For Use with Mobile Homes: No Interior/Exterior: Interior Lock Type: No lock Material: Zinc Package Quantity: 1 Package Type: Single pack Projection (Inches): 2 Shape: Round Style: Traditional Warranty: 10-year limited ANSI/BHMA Security Grade: Grade 2 (Better) CA Residents: Prop 65 Warning(s): Yes UNSPSC: 31162800