Incorrect tension is one of the most common causes of picking failure. Use of this tool provides an easy method to apply the correct amount of tension every time. All Torque and Tension tools provide a large opening diameter allowing unrestricted entry of picking tools. The dual prongs assure even torque, always keeping the plug in proper alignment. All units are feather weight and pocket sized with easy to hold knurled collars.TNT-2 includes an easy-to-read tension indicator and dual-coil spring construction.