Product Information: This pergola kit includes (4) pergola brackets shoulders. Simply cut the wood to your desired length and assemble each angle of the corner connector is 90 degrees and accommodates 4"" x 4"" lumber (exact measurement 3.5"" x 3.5""). Quality Materials: The pergola kit steel brackets are made of thickened plate steel structural with black powder coating, making them rust-proof and sturdy. This effectively extends the service life of the pergola brackets, ensuring they are breakage-proof and deformation-proof. You can build a stable pergola for family gatherings with these premium material pergola accessories. Additionally, they do not corrode or peel easily in bad weather conditions. Wide Application: The pergola brackets are commonly used in various places such as balconies, courtyards, parks, restaurants, and commercial venues. With a stable structure, you can build your outdoor pergola, wood patio covering.