The Brinks Commercial Commercial Entry Knob features push and turn button locking. Push interior button to lock the exterior door knob until it is unlocked with use of key or by turning interior knob. The deadlocking latch bolt is operated by the inside lever at all times. This lever fits doors 1-3/8-in to 2-in thick. It has a 3 hour UL fire rating and meets or exceeds 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 Equipped with ANSI F81 Non-Panic Release locking function Color/Finish Family: Black Hardware Finish: Matte Manufacturer Color/Finish: Matte Black Type: Keyed entry 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: Yes For Use with Hall/Closet: No For Use with Mobile Homes: No Interior/Exterior: Interior/Exterior Lock Type: Keyed entry with turn Material: Zinc Package Quantity: 1 Package Type: Single pack Projection (Inches): 2 Re-Key Technology: Traditional Shape: Round Style: Traditional Warranty: 10-year limited ANSI/BHMA Security Grade: Grade 2 (Better) CA Residents: Prop 65 Warning(s): Yes UNSPSC: 31162800