Installation and use of expansion bolts

 

How to install an expansion screw. Generally, an expansion screw consists of a screw and a tightening tube. First, an alloy drill with the same diameter as the expansion screw's tightening tube is used.

 

Generally, the depth of the hole is the same as the length of the bolt. Remove the expansion ring and insert it into the small hole.

 

Then screw in the screws.