Mortice arris rail brackets for concrete posts connect timber arris rails to concrete fence posts with a suitable mortice hole. The projecting end slots into the post and the formed bracket is nailed or screwed to the timber rail.

Product details

• Galvanised steel mortice adaptor bracket.
• Listed size: 200 × 62 × 62mm.
• For timber arris rails and morticed concrete fence posts.
• Pre-punched holes for fixing to the timber.
• Choose 1, 4, 8, 25, 50 or 75 brackets.

Bulk pack savings

50-pack: £82.38 including VAT — approximately £1.65 per bracket, saving 49% compared with 50 single brackets at £3.20 each. Select the pack quantity to see its current price. Prices and savings checked on 12 November 2026.

Will it fit my concrete fence post?

This is a mortice adaptor, designed to enter an existing mortice hole. Check the post opening and the actual rail dimensions before ordering. It is a different fitting from a rail bracket screwed directly to a timber post.

Can it be used for fence repairs?

It can provide the rail-to-post connection when replacing a timber arris rail, provided the concrete post and mortice remain sound and the replacement rail fits. Nail or screw the bracket to the timber using fixings suited to the fencing and its exposure conditions.

Need help choosing? Read our arris rail bracket sizes, types and fitting guide before ordering.

Manufacturer range guide

The Download datasheet (PDF) button opens a manufacturer range extract that includes the MARB mortice arris rail bracket. See the MARB section at the bottom: the bracket slots into a suitable mortice in a concrete post and fixes to the timber rail. Its supplier trade-box quantity does not change the retail pack selected on this listing.