Suitable for exterior doors requiring high security. Well suited for doors which are frequently used in daytime. The high security deadbolt is ideal for night time locking requiring greater strength and security. Can be used with fire rated doors. Includes two bolts which can be individually controlled. The double bolt action enables quick and easy locking. Ideal for use with access control systems and can be controlled by a variety of electrical impulse generating equipment such as card readers or timers.