Close to edge ability, non-expanding, and this is important when installing post on the edge were as dynabolts are expanding the hole and a very high chance of cracking the concrete.
The original Screwbolt - high-strength masonry anchor. The innovative screw anchor from the UK. The Excalibur Screwbolt is manufactured from boron steel, and are, as standard, case hardened and tempered to the Exacalibur specification; therefore a class of quality of grade 10.9 is a comparison based upon the core hardness figure achieved.
The unique patented thread of Excalibur Bolts makes it the only Masonry Anchor Screwbolt to be approved as an Undercut Anchor.