Using this 'No Hub' Torque Wrench is easy. First, make sure the wrench is set to the preset 60 in. - lbs. torque. Then, place the wrench on the screw or coupling you want to work on. When you start tightening, keep an ear out for the click sound, which means you've reached the right torque. For one - handed operation, hold the T - shaped handle comfortably. If you need to loosen a screw or remove a coupling, simply use the built - in reverse lever. As for maintenance, since all the mechanisms are sealed in the die - cast handle and permanently lubricated, you don't need to do much. Just keep it clean and dry. Avoid dropping it or using it with excessive force as it may damage the tool.