How to install commercial door knobs ?
There are various ways provided by Shenzhen Hongfa Automatic Door Co, Ltd. to help installation. Professional installation manual is provided by us, in which there are detailed instruction for customers to help install door knobs themselves. You can ask our after-sales service for installation support. They would provide professional installation guidance or send a video for you to install it.

Known as a leading supplier and manufacturer of roll up door, Hongfa Automatic Door Company is competitive in this field. The roll up door is one of the main products of Hongfa Automatic Door Company. Hongfa custom roll up doors is provided in varied design styles. Its control panel adopts Italy brand - SERVO. Only those that pass the rigorous quality tests will go to the marketplace. Its self-checking program can effectively show error codes.

The profound enterprise culture of Hongfa is beneficial to its development. Ask!
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