Allows you to tension wire up to 880 lbs with minimal effort with its 6:1 gear drive mechanism. Measure from 220 lbs - 660 lbs. Lightweight and easy to use. Instructions included. Comes with new in bag adjustment key. SELLING SEPARATELY ****8 packs of 25 new in bag joiner/tensioners - medium size $33 ****Also available 39 new, but not in bag joiner/tensioners - $39. Sturdy Gripple carrying duffle bag also sells - $18.