Brand new: lowest price
- Get it by Thu, 6 Dec - Wed, 9 Jan from Hong Kong, Hong Kong
- • New condition
- • 30 day returns - Buyer pays return postage | Returns policy
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. Now, the expansion screw can not be pulled out.