Review on M8 90Mm Expansion Screw With Eye Ring Anchor Internal Eye Bolt Fastener 304 Stainless Steel 5 Pack (Ring Lifting Expansion Eyebolt M8 90Mm) by Saul Rivera

I used a Dewalt DW5234 7/16" carbide hammer drill bit and drilled three inches into the concrete wall and then tapped it with a hammer to ensure a secure fit. You will need to glue the fastener in place the concrete before tightening the screw as it only rotates in the hole. Great product. No complaints!