Description: The Mountain Security Tulip knob and deadbolt combination fit all doors 1-3/8" to 1-3/4" thick and have a 2-way latch that fits 2-3/8" or 2-3/4" backset. The single cylinder deadbolt is keyed on one side with a 1 inch deadbolt. This combo pack meets ANSI Grade 3 standards. The knob & deadbolt are keyed alike for your convenience. There are 3 keys included.