This Vevor pergola bracket kit is designed for building a stable outdoor pergola, gazebo, shed, or similar DIY structure using actual 3.5" x 3.5" wood posts. Made from carbon steel with a black powder-coated finish, it is built to help resist corrosion, warping, and cracking in outdoor environments. The set includes 3-way and 4-way brackets with post bases for secure double-sided flat-roof pergola construction. It also features shade sail attachment holes for added sun and rain protection. The detachable design helps make installation, maintenance, and cleaning easier.