Product Description：
Material: 304 stainless steel
Product Name: M8*70 Stainless Steel Expansion Ring Bolt(Please note the M6 M8 Size is bolt diameter, not expanding tube size)
Package Includes:
3 x expansion Anchor eye bolt
Widely used in concrete and masonry: fence, burglarproof doors and window, canopy, air conditioning fixation, home decoration, engineering,etc.
Operating principle: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.