How about Hongwei anti theft door lock

Answer: It is recommended to remove the panel, remove 2 lock nails on the inner panel of the door lock, remove the upper and lower screws of the inner side panel, remove the inner handle panel, and then remove the lock cap and the outer handle, there is a screw in the middle of the stall of the lock body on the door side, between the deadbolts, take out this lock cylinder, and the lock cylinder can be taken out.

This type of lock has two deadbolts, the square tongue and the oblique tongue, and its structural characteristics are similar to those of the locks introduced earlier. It is also installed on the anti-theft door more, it also has flat locks and semi-round locks, left and right lock locks, single locks and double locks. However, due to the different needs and occasions of various building door activities, some locks are equipped with a pair of pull ring handles (one side of the lock body is a pull ring, and the other side is a handle), this kind of lock is often called "steel door", and can be selected arbitrarily according to different occasions. >>>More

Loose security door - security door maintenance instructions. >>>More

Remove the handle first, the upper and lower screws, and remove the second screw from the bottom to the top on the side, and the lock cylinder will come out.

1. If we encounter the problem of not being able to close the security door when we close it, it may be that the security door is deformed, or the hinge. >>>More