JackJaw® Extractors are the New Force in Sign Post Pulling! JackJaw® 300 "U" Channel and Ground Rod Extractor is the fast, easy and safe way to pull sign posts, T posts, and ground rods. The powerful, patented jaw mechanism allows you to pull posts straight out of the ground without bending them. The jaw mechanism provides a positive grip that prevents back and shoulder strain that results from the whiplash of other pullers. The sturdy lever arm gives you a 16 to 1 mechanical advantage. A 100lb down force on the handle generates a 1600lb upward force and a 3200lb gripping force on the post. JackJaw® Extractors are produced in Dayton, Ohio from heavy gauge steel plate and tubing to withstand everyday job site use. The easily replaceable jaws are case hardened AR400 steel for long wear. JackJaw® units have a zinc and clear chromate plating for long lasting durability and corrosion resistance. Other models pull square and round sign posts. When extra force is needed, the JackJaw® 500 series of pullers give you a massive 28:1 mechanical advantage!