Their own security door, every time the door is very costly to open the door. Lock the door when the door handle up to mention, very easy. But when the door open, whether it is inserted into the key from the outside open, or from the inside down the door handle, it is difficult to open the door, that a few out from the door that a few columns (Figure) is difficult to retract Inside the door. What is the cause of this? What steps need to be done to make it switchable? More
Should be the problem of the cylinder, another lock cylinder just fine
You have no oil, and now the lock is not oil, if they have all inside will be tired of the inside. This can only change the lock core.
In each side of the tongue spray lubricant, oil is better, and you have this anti-theft door in the outside when the lock door should be no key, right? Is not the outside of the door handle up to be able to lock all the tongue? If that is the case, every time you lock the door when you want to pull the handle in place, or you then take the key to open the time when the power of the duo locusts Xin Hao Kun will be immobile key.
