https://mosegaard-harbo.blogbr....ight.net/22the-hook-
https://www.openlearning.com/u..../hagankristensen-slv
Types of Deadlocks for Doors Hook bolt deadlocks are used on sliding narrow stile aluminum storefront doors to increase security and strength of locks. They are keyed on both sides for greater flexibility in access control. To measure accurately for a new lock, first determine the door's case depth (or backset). This is the distance between the edge of the f