Product Information: This pergola kit includes 4 packs pergola brackets. Actual inner size:5.5x5.5inch,This size applies to nominal standard 6""x 6"" wooden post (actual 5.5""x 5.5"" post on market) there is a slight error in the actual size, usually the error is about 1mmEach angle of corner connector is 90 degrees. Simply cut the wood to your desired length and assemble..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, so there s no need to worry about..Wide Application: The pergola brackets are commonly used in various places such as balconies, courtyards, parks, restaurants