Designed for convenience and versatility. The lock is compatible with most interior residential and commercial doors. Ideal for doors that need to be locked/unlocked from inside with a thumbturn, and locked/unlocked from outside with a key. The knob has a tubular chassis and fits doors from 1-3/8” to 2” thick. It has a 3-hour UL fire rating and meets ANSI Grade 2 standards. The doorknob and deadbolt are keyed alike.