This is our Super Duty Buck thorn tree and post puller pulling a steel fence post and a 5 inch cherry tree. The jaws on this unit open 10 inches wide, and are 10 inches deep by 8 inches tall. This unit can grab a railroad tie or large tree, and can easily pull out a 6 to 8 inch tree (depending on size of your machine and root structure of tree) These units are available in many configurations. Made in Minnesota by people who care.