[Multiple Colors]

Tips: Due to different monitors, shooting light, environmental factors and other reasons, there are some color differences that exist objectively and cannot be avoided. But usually does not affect the use of the product, if you mind these, please consider carefully before buying. thank you!
Made of metal material moderate price in silver tone, phillips workmanship flat head, exspansion anchor bolts.
They recommended can be widely used in fence, burglarproof doors and windows, canopy, air conditioning rack fixation, home decoration, engineering, etc.
The working principle of expansion screw: Put the expansion screw into the ground or the hole on the wall and then tighten the nuts of the expansion bolt with wrench. The bolt goes outside while the metal sheath does not move. Thus the bigger head of the bolt will expand the metal sheath, making it fill the whole hole. Now, the expansion screw can not be pulled out.