[4 Pack] 2 3-pin traction sockets and 2 3-pin traction sockets. The 3-pin trailer connector socket is suitable for trailers, semi-trailers, RVs, agricultural vehicles, etc. [Brass Pin] 3-pin trailer socket with 3 flat connectors. 3-pin tractor socket with waterproof cover, suitable for all road and weather conditions. 【Function】The 3-pin trailer socket is usually used to connect power and control devices for agricultural machinery, excavators and accessories for all weather conditions or simple electrical applications.