Stainless Steel Lifting Expansion Eyebolt with Ring Expansion Pack of 5

Principle of operation: Place the expansion bottle in the ground or in the wall outlet, and then tighten the screws on the screw with the key. The bolt comes out as long as the metal shell does not move. In this way, a larger screw head will extend to the metal shell, which will fill the entire hole. Now, the expansion screw can not be pulled. Widely used in fences, doors and windows, canopy, fixing air conditioners, home decoration, engineering, and more. The expansion is created by tightening a screw with a thread that pulls the tapered cone that widens the sleeve from the hole walls.