Hi, We are TOP-SIN

Hello,here is our workshop and production line ,any time ,anyone come to China ,can arrange a visit to our factory .


We are a one of the leading locks manufacturer in China with a passion for design & developing beautiful door accessories. We can give u one-stop purchasing for all items of doors


We have worked in this areas for more than 20 years in production and also in exporting jobs. Any more requirements ,please feel free to contact us . 24 hours working line : +86-13702200743