In the realm of the Impact wrench, Torque is king. Most wrenches will boast of their torque in their product descriptions and with good reason. Torque is after all the sheer power that the wrench can put out, and the best cordless impact wrench is going to generate high torque – if it doesn’t, it won’t be the best wrench, simple. The menu of categories in the specs will usually highlight these metrics to make sure a customer knows what they’re getting into.  RPM and IPM are important too of course. RPM of course stands for Revolutions per Minute and refers to the times the wrench can spin the attached socket or bit. Impacts Per Minute (IPM) refers to the number of impacts form the internal mechanism (referred to as the “Hammer”) which is the part of the design that puts the Impact into Impact Wrench. Removing this would completely change the function. When preparing to order your new wrench; one that you like, make sure the products you’re looking at have enough free power to meet all these demands (like the ones on this list). If the new wrench measures well in these categories, you can rely on it to be one of the more powerful new products out there.