The security door of my house is not easy to open, the lock cylinder can t pop out from time to time

Buy by yourself: The price of the anti-theft door lock cylinder is generally between 30-60 yuan, [it is the retail price, including 20-30% of the profit].

It takes 80-160 yuan to let others come to replace it, and the cost is generated in this way: in addition to the purchase price of the lock cylinder, because the unit and individual who change the lock need a certain cost before determining the transaction with you, the normal expenses of the enterprise, the advertising fee, the public relations fee, the transportation fee, the tax fee, the warranty cost. Finally, there is profit income, that is to say, ask someone to come to the door to change a lock cylinder, most of the cost you buy is not the lock cylinder itself, it is a service, just like unlocking, you buy a service,.

In fact, the biggest cost of the lock replacement company is not the lock itself

It's easy to change, you have to remove the old one first, and then go to the place where the security door is sold, the quality, the model is different, the price is different, from dozens to hundreds, the general is about 30. If it is a Changling security door, there will be professional personnel to provide door-to-door service.

Take a photo and send it to my mailbox I can provide you with door-to-door service or express the lock cylinder. The installation process can be sent to you.