1The outside has a handle and a lock with a key, and an open handle and an antilock knob inside. 2The door handle lock kit can be used for easy installation of the door. 3The lock does not need to distinguish the direction, suitable for the left and right door. 4Suitable for exterior doors requiring key entry and safety protection. Internal knob with universal handle. 5Single tongue lock body size can be adjusted between 6070mm/2.362.76in, the size of the latch is adjustable to meet the standard opening size. 6Smart Key Update technology allows you to reencrypt your lock in seconds. 7Simple installation, antikick, anticollision, antimite, antidrill and antisaw. 8Security is designed to prevent common types of intrusions to ensure family safety.