Fence Brackets for Timber or Concrete Posts: Which Type Fits?
Choose the bracket for the connection you need to make, then measure the post and panel arrangement. Holding a panel in place, joining an arris rail and anchoring a post to the ground are three different jobs.
The phrase “fence post bracket” can describe any of them. Before buying, decide which part of the fence needs support and check that the timber and post are in sound condition. A bracket is not a substitute for replacing a failed post or a rotten panel.

Pick the bracket family first
| What you need to do | Product family to investigate |
|---|---|
| Help retain panels at a slotted concrete post | Fence-panel security bracket |
| Connect an arris rail to a post | Arris rail bracket suited to the post and rail |
| Fix a timber post to a suitable concrete base | A specified bolt-down post support and suitable anchors |
| Extend an existing timber post | A post-extender system approved for the intended arrangement |
Arris rail brackets also differ. A bracket made for a timber post is not automatically the same as a mortice-style fitting for a concrete post. Match the rail shape and the post detail, not just the bracket length.
Does a 4-inch post need a 100mm-wide bracket?
Not necessarily. Nominal post descriptions and a bracket’s measured centre span can differ because of the post profile and how the bracket wraps around it.
Our 10-pack of fence-panel security brackets is described for nominal 4-inch concrete posts, but its dimension drawing shows a 125mm centre span. It also shows 50mm end tabs, a 40mm height and 22mm returns. Compare that drawing with the actual post and panel positions.

What should I measure?
Measure the post where the bracket will sit, including any changes in profile. Check the distance and offset to the timber fixing faces, the space available for the tabs, and whether both fixing positions land in sound timber. Account for the panel’s position within the post slots.
Check the bracket finish and the specified fasteners for the outdoor exposure and timber. Do not assume the screws shown in an illustration are supplied in the pack. Confirm the pack contents on the product page.
Will security brackets stop panels being lifted?
When correctly selected and fitted, they can help retain a panel and make unwanted lifting more difficult. They do not turn a fence into a guaranteed security barrier, and they cannot correct loose foundations or decayed timber.
Browse fence brackets for the different connection types. For timber rail repairs, compare the timber-post arris rail bracket with the concrete-post mortice arris rail bracket before choosing.
Choosing a ground support? Compare fence post spikes, repair spikes, driving tools and post shoes in our sizing and installation guide.