(4) Wpbhk 4Pcs Heavy Duty Pergola Corner Brackets Extension 3-Way T Brackets For ?Quality Supported Structure??The pergola top bracket kit made of 2.7mm thickened high-quality metal and black powder-coat finish for extra corrosion resistance,it will not easily break off and be out of shape when using. ?Adjustable??Our Inner diameter of the pergola extension bracket is 3.55 inch,use for 4 x 4 Post (Actual 3.5"x 3.5" on market ),the other side can be adjusted according to the actual size of the wooden column.(Can be opened to fit post already being used on pergola) ?Enhanced Stability??These brackets are extremely thick and heavy.Rugged craftsmanship provided additional structural stability and support for wooden construction projects. DIY Pergola Kit??If you are looking for a modern pergola to build or extend your pergola, but don't want to spend a lot of money,our pergola hardware is a good choice.Use this extension pergola bracket used for balcony,courtyard,patios,commercial venues and park,you can build the perfect outdoor place gathering or entertainment. ?3-WAY T BRACKET??Includes 4 pergola bracket, 56 screws.Each heavy duty bracket has pre-drilled holes,just cut the beam to the length you want and choose desired location,mark it,drill holes on the wooden beams, assemble and lock nuts.