Description

Progola Internal Corner Brackets x4 (Suitable For: 4in / 100mm Post)

Reinforce your pergola joints with the Progola Internal Corner L-Bracket — a heavy-duty steel brace designed to strengthen 90° timber connections from the inside. Purpose-built for 4″ / 100mm posts, this pack of 4 brackets delivers the structural integrity your pergola, garden structure, or DIY timber build needs to stand firm for years.

Effortless Corner Reinforcement

Installation is straightforward: position the bracket tightly into the internal corner where two pieces of timber meet at 90°, then drive screws through the pre-drilled holes into both timbers. The result is a rigid, load-bearing connection that prevents joints from loosening, twisting, or pulling apart over time. Each bracket features 4 staggered screw holes (7.5mm diameter), precision-positioned to eliminate internal screw collisions when used alongside other Progola system components.

Heavy-Duty Build Quality

Manufactured from 2.5mm thick galvanised steel — significantly heavier than standard brackets — the Progola Internal Corner Bracket is engineered for serious structural support. The galvanised core provides permanent rust protection, even if the outer coating is scratched or chipped. A premium textured black powder coat finish ensures each bracket looks as good as it performs, blending seamlessly with your pergola framework.

Key Features

• Pack of 4 internal corner L-brackets — enough for a full pergola frame
• Sized for 4″ / 100mm timber posts ensuring a flush, precise fit with no overhang
• 2.5mm thick galvanised steel for superior joint strength and lifetime corrosion resistance
• Textured black powder coat finish for a durable, premium appearance
• 4 staggered screw holes per bracket (7.5mm) prevent screw collisions during installation
• Compatible with standard timber sleeper screws for quick, secure fixing
• Designed and manufactured in the United Kingdom using British-sourced steel

Installation Tips

Press the bracket firmly against both pieces of timber at the 90° bend before driving screws. Ensure all four screws are fully tightened for a secure, wobble-free joint. Screws and fixings are sold separately — we recommend dedicated timber sleeper screws for the best hold.