... latches mortise, deadbolt function, high security Zinc Alloy material Keyless door locks,FeaturesZinc Alloy materialFive-latches mortise, deadbolt function, ... encrypting elements48 bits card special logic key encrypting and system data DES encrypting32 bits card special logic key ... encrypting and system data DES encryptingpower supply4 pieces or 6pieces 5# ...