Classic Industrial Double STD 164-1 Switched Socket on Surface Box - Crabtree Electrical The Crabtree 7392/001P delivers robust electrical connectivity for demanding industrial environments. This double switched socket features the reliable STD 164-1 specification, mounted on a durable surface box for straightforward installation. Built to withstand heavy-duty applications, it combines practical functionality with industrial-grade construction. Ideal for workshops, factories, and commercial installations where dependable power distribution is essential.