What size impact wrench and which way do you turn it?

The size of the impact wrench you need typically ranges from 1/2 inch to 3/4 inch for most automotive applications, with 1/2 inch being the most common. To loosen bolts, you should turn the wrench counterclockwise (left), while tightening bolts requires turning it clockwise (right). Always ensure you use the correct torque settings for your specific application to avoid damage.