8, M8 x 100 Genuine Thunderbolt® Masonry Concrete Anchor Screw with Hexagonal Head (V35157)

These are great, held a big gate post which had become unstable securely again to the wall. Used 10mm drill bit into the post and an 8mm drill bit into the masonry and it worked a treat.

I used the bolt to affix some wooden posts to brick work, they were easy to use just drill the right size hole and screw in they have been sturdy all summer long and are still holding my gate up cannot be happier

I bought these bolts to hang a punch bag/pull up bar onto a brick garage wall. The bolts included with the bracket proved woefully inadequate. These Thunderbolt's are incredible, they provide a VERY strong bond, the deep threads cutting into the brick and they require no plugs ect. Be sure to use a 8mm drill bit for the pilot hole and a ratchet to screw the bolts in, this requires some effort!

Did the job perfectly

I used these to secure a wooden doorframe to a brick wall for my garage side door. I used an 8mm wooden drill bit for the wooden frame and an 8mm Masonry bit for the wall. It went in tight with no issues and is very secure. The heads are 15mmI used a 15mm socket to tighten them. Since I wanted the bolt heads flush in the frame I had to use a 22mm forstner bit so I could tighten the bolt down flush.

Excellent

I am an old school guy loathe to try new things and have been locked into the world of frame fixings (long screw encased in a nylon plug) or those damned fiddly expansion bolts. I needed to fix 4x2 timber to an old victorian red brick wall to reinforce the void behind a dry wall. I bought a pack of 8 thunderbolts a bit suspicious that any would work. When the first fixing took I was pleasantly surprised (it was too easy). When the next 7 took perfectly and the job was done in minutes I was over the moon. Still suspicious though I grabbed the timber and yanked it with all my might and it did not budge. I am converted now. And unlike expansion bolts, You can remove them easily in the future.

A post on the frame of my gate was coming away from the wall it was screwed into. This happened because the tradesman who installed the gate put the fixing into the mortar rather than the bricks, so over time the mortar crumbled. I bought these thunderbolts as I read that they after drilling the correct size holes, 8mm in my case, the bolts would screw into the fence post and brick with no further fixings required. They worked perfectly and made a very secure fixing of gate post to wall. I will use these in future if I need to secure anything to brickwork.