Uxcell M8x60mm Hex Expansion Bolt 304 Stainless Steel 4 Pack

Uxcell M8x60mm 304 Stainless Steel External Hex Expansion Bolt Sleeve Anchor 4 Pack 1.Expansion is created by tightening a threaded bolt which draws a tapered cone expanding a sleeve against the walls of the hole. 2.Widely used in fence burglarproof doors and window canopy air conditioning rack fixation home decoration engineering etc. 3.No rust no deformation non-pollution. How to use: 1.Put the expansion screw into the ground or the hole on the wall and then tighten the nuts of the expansion bolt with a wrench. The bolt goes outside while the metal sheath does not move. 2.Thus the bigger head of the bolt will expand the metal sheath making it fill the whole hole. 3.Now the expansion screw can not be pulled out.