TEKTON 3/4 Inch Drive Sockets are well-suited for big service and repair jobs on heavy equipment, trucks, tractors, and large machinery. The 12-point socket opening is an exact fit for double hex fasteners and also works with hex and square shapes. It's designed to grip the sides and not the corners of the fastener heads, preventing round-off. The large, die-stamped markings are permanently impressed into the material and optimized for readability. A mirror chrome-plated finish protects against corrosion and easily wipes clean. TEKTON 3/4 Inch Drive Sockets are available in a complete range of sizes from 3/4 to 2 inch and consistently meet or exceed the industry standards for socket strength and performance. Material: Chrome-Plated Steel.