National Hardware N166-001 Lockable Security Bolt, 6", Black National Hardware's 6-in lockable security bolt in black is used for securely locking barn doors, gates and shed doors. Designed to be used with a padlock for additional protection. Features National Hardware's 6-in lockable security bolt in black is used for securely locking barn doors, gates and shed doors. Designed to be used with a padlock for additional protection. Black finish for style and durability. Mounting hardware included for easy installation Can be padlocked for extra security For exterior applications. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.