Socket Wrenches

After the ordinary wrenches we just described, the socket wrench is probably the most commonly used automotive tool. This type of wrench is actually a separate handle that attaches to different-sized heads called sockets. Socket wrenches are manufactured in sets.

Individual sockets come in many sizes.

The size of the socket refers to the size of the bolt head that the socket fits (A). A drive lug on the socket handle fits into a drive hole on the socket (B).

Sockets are made with a variety of different-sized drive holes, including 1/4-inch, 3/8-inch, and even 1/2-inch holes. The individual sockets can then be snapped into any type of handle that’s appropriate for the job you’re doing.

Several different types of handles are used to turn sockets. The most common handle is the reversible ratchet handle. A reversing lever on the handle allows you to change the direction of the handle’s rotation to either tighten or loosen bolts. Reversible ratchet handles are great for quickly removing and installing bolts. However, they can be damaged if too much pressure is placed on them. So, when you’re using a socket on a tight bolt, you should use a breaker bar to turn the socket. A breaker bar is simply a bar with a drive lug on its end. Since a breaker bar has no ratchet mechanism, it can withstand more force than a ratcheting handle.

Along with the handles that are used to turn sockets, most socket sets also contain a variety of extension bars and adapters. These bars allow the sockets to be used in all sorts of different situations. For example, the speeder handle shown is used to turn sockets in tight places.