Brinks 2717-109 Single Cylinder Deadbolt Keyed on One Side, Antique Bass Single cylinder deadbolt is keyed on one side Meets ANSI Grade 2 standards for pick, drill and bump resistance Durable metal construction with 1 inch deadbolt and steel anti-saw pin 4-way adjustable latch that fits any 2-3/8" or 2-3/4" backset Easy to install and fits all doors 1 3/8 inch to 1 3/4 inch thick