All of Liberty’s full-sized safes feature unibody construction for improved body strength. The 11-gauge steel used in Level 4 safes further adds to that strength: Thicker steel helps decrease the likelihood that a burglar can successfully drill into your safe. It adds weight to your safe, too.

The thicker the door, the more difficult it is to pry open. Security Level 4 safes feature a 1-inch Tough Door that goes above the security of a Level 3 1-inch composite door. Level 4 doors are 4.5" thick and feature a 1-inch composite door front with 60% inner steel door plate.

Safes that have Level 4 security feature Liberty’s innovative Monster Mech. DX-90 Monster Lock Mechanism is included on all safes equipped with a Touch Door. This locking mechanism features an over-center, direct-drive cam mechanism and provides better side-bolt protection by removing all pressure from its locking bolts with a unique dead lock system. And like all of Liberty’s locking mechanisms, the DX-90 Monster Mech comes with our innovative slip-clutch technology.

Liberty’s patented military-style locking bars provide more security than traditional locking pins. Each 4-inch bar is 1/4" thick, with the Franklin Series safes featuring up to a total of 15 bars on its doors’ four sides and the Fatboy 64 boasting a total of twelve 1/4" thick locking bars.

Liberty’s Level 2-4 safes all feature triple hardplate steel that protects their locking mechanisms. This extremely hard steel stopped drilling attacks during its UL-Listing testing, so you can trust it to protect your safe, too!