The Vevor concealed joist hanger set is designed for 2x4 lumber and provides strong, secure support for outdoor wood structures. Made from 0.08" thick steel with a black anti-rust coating, it is built to withstand rain, heat, and long-term outdoor exposure. Its reinforced L-shaped design helps resist twisting and deformation while maintaining structural stability. Pre-drilled holes and included self-tapping screws make installation quick and easy for both DIY users and professionals. Ideal applications include pergolas, swing chairs, fences, wooden slides, and cabins.