Wrench is a full service auto repair shop without the shop! Our mobile mechanics service all types of cars and trucks, offering everything from oil changes and tune ups to brake jobs and no-starts. Our ASE certified mechanics can perform most jobs right in your driveway or at your parking spot at work giving you the freedom to spend your time on more important things.

Cordless impact wrenches are a great tool to use regardless – but they’re even better for people who enjoy working freely and without the restriction of a cord, or for people who need to be able to have tools that can travel with them throughout a workday. Cordless impact wrenches help to make work more convenient and an easy without sacrificing on any of the power that the air powered models are able to produce.

Size is usually designated by dimensions such as across-flats distance (inscribed-hexagon size). In the 19th and early 20th centuries, it had been common to define the nominal size of the wrench according to the nominal size of the screw thread that it was meant to be used with. Modern practice uses a size designation based on across-flats distance, whether measured in metric or in inch units.
DeWalt’s 20-volt 880 Lithium-Ion cordless impact is a 1/2-inch drive job with a whopping 400 foot-pounds of torque rating. This tool has a variable-speed trigger with an electric brake; an ergonomic handle provides added control and comfort. It even includes an LED light with 20-second delay, providing greater visibility when working in dark areas. See the Summit Racing catalog for more info. (Image/Summit Racing)

Wrenches are used for tightening and loosening nuts and bolts and they come in many sizes. An adjustable wrench allows you to work with many different sizes without having to change tools. Combo wrenches include a ratchet head at the other end and socket wrenches hold various sizes of fasteners in one head. Find a wrench set to meet your needs whether you need a set of 5 to keep on your boat, or larger set for working on the car or around the house. Find amazing deals on tools that last at Harbor Freight Tools.
Box-end wrenches have ends that enclose the nut and have 6, 8, 12, or 16 points inside the head. A wrench with 12 points is used on either a hexagonal or a square nut; the 8- and 16-point wrenches are used on square members. Because the sides of the box are thin, these wrenches are suitable for turning nuts that are hard to reach with an open-end wrench.

Cordless impact wrenches are a great tool to use regardless – but they’re even better for people who enjoy working freely and without the restriction of a cord, or for people who need to be able to have tools that can travel with them throughout a workday. Cordless impact wrenches help to make work more convenient and an easy without sacrificing on any of the power that the air powered models are able to produce.

Torque Wrenches. A torque wrench allows you to apply a precise measure of force, or torque, to a bolt. Use these wrenches when you need to tighten bolts an exact amount, such as in engine repair. Some models have a scale that indicates the torque. Others create a clicking sound when the desired torque is reached. You can also find options with digital readouts for extra precision. 

Cordless power tools (including impacts) are the becoming more and more common. They’re especially popular with racers. The reason being, most racecar trailers aren’t equipped to handle a high-horsepower, two-stage compressor. That means the generator most racers have can be used to keep tabs on the battery charger(s) for these electric tools. Torque output of the tool is important, but because the battery is the heart of what powers any cordless tool, picking the type of battery technology that the tool uses is critical.
Impact wrenches are available in all sizes and in several styles, depending on the application. ¼" drive wrenches are commonly available in both inline (the user holds the tool like a screwdriver, with the output on the end) and pistol grip (the user holds a handle which is at right angles to the output) forms, and less commonly in an angle drive, which is similar to an inline tool but with a set of bevel gears to rotate the output 90°. ⅜" impacts are most commonly available in pistol grip form and a special inline form known as a "butterfly" wrench, which has a large, flat throttle paddle on the side of the tool which may be tilted to one side or the other to control the direction of rotation, rather than using a separate reversing control, and shaped to allow access into tight areas. Regular inline and angle ⅜" drive impact wrenches are uncommon, but available. ½" drive units are virtually only available in pistol grip form, with any inline type being virtually impossible to obtain, due to the increased torque transmitted back to the user and the greater weight of the tool requiring the larger handle. ¾" drive impact wrenches are again essentially only available in pistol grip form. 1" drive tools are available in both pistol grip and "D handle" inline, where the back of the tool has an enclosed handle for the user to hold. Both forms often also incorporate a side handle, allowing both hands to hold the tool at once. 1¼" and larger wrenches are usually available in "T handle" form, with two large handles on either side of the tool body, allowing for maximum torque to be applied to the user, and giving the best control of the tool. Very large impact wrenches (up to several hundred thousand foot-pounds of torque) usually incorporate eyelets in their design, allowing them to be suspended from a crane, lift, or other device, since their weight is often more than a person can move. A recent design combines an impact wrench and an air ratchet, often called a "reactionless air ratchet" by the manufacturers, incorporating an impact assembly before the ratchet assembly. Such a design allows very high output torques with minimal effort on the operator, and prevents the common injury of slamming one's knuckles into some part of the equipment when the fastener tightens down and the torque suddenly increases. Specialty designs are available for certain applications, such as removing crankshaft pulleys without removing the radiator in a vehicle.
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