"I would recommend these and have specified them on a couple of jobs. Together with Fischer S8 plugs they make a practical fixing for wall starting and blocking up. I can't comment on their long term durability and have always given them at least 40mm of cover with 1:1:6 so can only I hope they will last longer than I do. They also make a handy fixing to restrain temporary access towers. I used 2 in to brickwork together with webbing straps and found myself really leaning on them to core through 225mm of concrete today. A 107mm core, so a lot of leaning and no pull out! I would give them 5 stars if they were made of stainless steel"