The Brinks Commercial Keyed Entry Knob with Deadbolt is designed for convenience and versatility. The lock is compatible with most interior residential and commercial doors. It locks and unlocks from the inside with a thumbturn, and from the outside with a key. The knob has a tubular chassis and fits doors 1-3/8” to 2” thick. It has a 3-hour UL fire rating and meets ANSI Grade 2 standards. The knob and deadbolt are keyed alike.