An absolute must when rigging aircraft cables in that it saves time and simplifies the task of adjusting flight control turnbuckles. The tool is easily installed with one hand in tight spots. Simply attach the "C" clamps to safety holes in the turnbuckle cable ends (can also be clamped into the fork or eyelet), and hold the chain firmly with one hand. The chain will resist cable rotation while allowing the tool to conform to its confines as you turn the barrel with the other hand. Works on all cables 1/16" to 1/4" having MS thimbles or equivalent on any size aircraft. 1 lbs (0.5Kg) shipping weight.