The Lisle Large Tap Socket Set, 5 Pc. - 71670 is a must-have for any professional mechanic. This set includes five large tap sockets, perfect for working on a variety of vehicles. The sockets are made from durable, heat-treated alloy steel, and feature a black oxide finish for added corrosion resistance. The set includes 1/4", 5/16", 3/8", 7/16" and 1/2" sizes, allowing you to tackle any job. The sockets also feature a 3/8" drive, making them easy to use with any ratchet or power tool. With this set, you'll have the right tool for the job every time.