The Gripple Tensioning Tool is a gear-driven tensioner that has slots to accept all the different size Gripples. One tool works on them all, and you don't have to make any adjustments to go from a Large Gripple, to a Medium Gripple or a Jumbo Gripple. It is powerful and generates up to 800 pounds of tension. (12.5 gauge hi-tensile should be tensioned to only 150 to 200 pounds.) It is lightweight (1.6 pounds) and made of hardened steel and engineering polymer. It's ergonomic design is compact and easy to handle - operate and carry. The Gear-drive delivers a 6:1 mechanical advantage.