3 bolt deadlock is a type of lock that provides enhanced security compared to standard locks. It typically
consists of three large steel bolts that extend into the door frame when the lock is engaged. Here are the security features offered by a 3 bolt deadlock

The inclusion of three bolts makes it significantly more difficult for an intruder to force open the door. The bolts extend horizontally or vertically (or a combination of both) into the door frame, providing increased resistance against physical attacks. 3 bolt deadlocks are typically constructed using heavy duty material such as hardened steel. This makes them resistant to drilling, cutting or other forced entry techniques. High quality 3 bolt deadlocks incorporate anti-pick features to prevent unauthorised individuals from manipulating the lock using complex keyways, security pins, and additional security measures to deter picking attempts