YVHFWOY 4x4 Pergola Bracket Kit 4pcs — Black 3-Way 90° Corner Brackets, Heavy-Duty 2mm Steel

A set of four heavy-duty 3-way 90° pergola corner brackets by YVHFWOY designed to securely join standard 4x4 (3.5" x 3.5") lumber for stable outdoor pergolas and arbors.

These YVHFWOY pergola brackets are engineered for strength and weather resistance, made from 2mm Q235B steel with a black powder coat to resist corrosion. Each kit contains four extended right-angle corner brackets, a twist drill bit, and 72 tapping screws so you have the core hardware needed to fasten posts and beams. The inner sleeve measures to fit nominal 4x4 posts (actual 3.5" square), making the set compatible with common lumber dimensions used in home decks, patios, and garden structures.

How do these brackets improve pergola stability?

The bracket’s extended 90° profile and internal triangular baffles increase rigidity where posts and beams meet, reducing wobble and distributing load at corners. Welded high-strength construction minimizes deformation under stress, giving a firmer frame than simple face-mounted plates.

• 2mm Q235B steel for strong load-bearing joints
• Triangular interior baffles to resist lateral movement
• Extended sleeve design stabilizes the post-beam connection

Will this kit fit my 4x4 lumber and outdoor conditions?

The inner diameter accommodates standard 4x4 posts measuring about 3.5" x 3.5", so it works with the most commonly sold dry lumber. A black outdoor powder coat adds a protective finish against rust and weathering, suitable for exposed patios, pergolas, and garden structures.

• Inner sleeve approximately 3.6" x 3.6" for nominal 4x4s
• Powder-coated finish for corrosion resistance
• Recommended for dry, treated, or painted lumber installations

What comes in the box and how hard is installation?

The kit includes four 3-way 90° corner brackets, a twist drill bit, and 72 tapping screws—everything to anchor the corners of a small-to-medium pergola grid. Installation is straightforward: cut lumber to length, insert posts into the sleeves, pre-drill using the included bit, then secure with the supplied screws. A simple manual is included to guide placement and screw patterns.

• 4 x 3-way corner brackets for four corners or junctions
• 72 tapping screws and one twist drill for pilot holes
• Quick assembly with basic power tools (drill, level, measuring tape)

Where are these brackets most useful around a home or business?

YVHFWOY pergola brackets are versatile for many outdoor builds—balanced between DIY home projects and small commercial installations. They’re commonly used in backyard pergolas, balcony trellises, restaurant patios, garden arbors, and other modular wood structures where square-post corner strength is critical.

• Residential patios and deck pergolas
• Commercial outdoor seating and shade frames
• Garden arbors, walkways, and balcony structures

Who is this for: This 4-piece YVHFWOY bracket kit is aimed at homeowners, handypersons, and small contractors building or reinforcing pergolas and outdoor frames with standard 4x4 lumber. If you need durable, simple-to-install corner connections that resist weather and lateral forces—without custom metal fabrication—this kit supplies the core hardware to complete a stable, long-lasting structure.