Socket Wrench Accessories | McMaster-Carr- electrical socket wrench size ,External Torx-Plus Socket Sets. With sizes from EP10 to EP24, these sets have the sockets you need to install and remove a wide range of External Torx-Plus fasteners. Pair them with a square drive tool, such as a socket wrench, to deliver high levels of torque without slipping.Socket wrench - WikipediaSocket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of wrench (spanner in British English) that inserts into a socket to turn a fastener, typically in the form of a nut or bolt. The most prevalent form is the ratcheting socket wrench, often informally called a ratchet.