A torque wrench is a tool used to tighten nuts and bolts to a predetermined torque value. This instrument allows fasteners to be tightened to the proper tension, helping avoid damage from over tightening or joints coming apart from under tightening.

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Torque meters are used to check and set torque wrenches or drivers. The meter takes a reading from the wrench and in turn then gives you that reading to check if the wrench is accurate or not. This could be especially important in the aerospace or automotive field.