The Ultima Seven Security Style also has double stitched seaming to further strengthen the bag and prevent the seams from unraveling. The Standard Bags are also reinforced with a vinyl trim at the corner for additional protection around the lock and zipper. The built-in maximum security spring loaded lock is uniquely keyed. The lock is unique because the key cannot be released until the lock plunger is pressed down. This feature prevents users from accidentally locking their keys inside the bag. Once the bag is secured, the contents can only be accessed by an authorized employee possessing the key. Two keys are supplied with each bag, which is ideal for multiple bag users.