Mechanical Lock Body

He said: "I don't need the world's best lock. I need a lock that is the same every time. Same hole positions. Same feel. Same quality. Batch after batch."

That stuck with me. Because he is right. Door factories cut thousands of door holes. If the lock holes move by 1mm, every door is wrong. That is a disaster.

So we make this mechanical lock body for people like him.

Single latch. Single square bolt. Nothing new. The sizes are 125x22mm and 145x22mm. These two sizes cover 90% of interior wooden doors in China. You do not need to change your door hole. You do not need to train your installers. You just put it in.

One customer buys 100,000 of these every year. He told me: "I have been buying from you for 3 years. I have never had a complaint from my customers. That is why I stay."

We have used the same three suppliers for steel, bolts, and spring wire for over 8 years. The material difference between batches is less than 0.5%. You will not get a tight batch and then a loose batch.

We also make 500,000 units per month. We keep 50,000 in stock. Half are 125mm. Half are 145mm. Standard orders ship in 7 days. If you are in a hurry, we can ship in 3 days.

We can do that. Laser mark on the face plate. We can also do custom key systems. Keyed alike. Master keyed. Grand master keyed.

We have a team that follows up after you receive the goods. They call. They ask how things are going. If there is a problem, we figure out who caused it. If it is our fault, we replace the locks and pay the shipping. If it is shipping or installation, we give advice.

Wenzhong started in 2000. 25,000 square meters. 80 workers. 100+ machines. 16 patents. Fire certification GB 12955 (1.5 hours).