This Snap-On Tools socket, model S9840C, is specifically designed for use with 1 1/4 inch thermal vacuum switches. It is a high-quality, single item that is perfect for automotive professionals or DIY enthusiasts. The socket is made by Snap-On, a well-known brand in the industry, and features a 6 point drive type with a 1/2 inch drive size. This socket is ideal for those who work in the automotive industry, as it allows easy access to thermal vacuum switches without causing any damage. Its size of 1.25 inches makes it perfect for use with standard socket types, and it conforms to SAE system of measurement. This socket is a must-have for any automotive technician or DIY enthusiast who wants to ensure their equipment is of excellent quality.