Special Wire Twisting Pliers
This is a specialized tool but nothing will beat it as a time saver if you need to do the work. Use it for fencing, tying bundles of pipe, fastening a garden trellis together and much more. Just place the two wire ends in the jaws and lock them shut. Then pull the knob on the spiral-twist rod. Max practical wire size to use is about 3/32" diameter. Use the larger size for those larger projects that need more rotations to do the job properly.