Post Master 8000 Post Drivers are ideal for pounding fence posts, sign posts, guard rails, median dividers, tent stakes, railroad ties and more. Designed for smooth operation with no shock load back to skid steer. The Hammer weight is 275 lbs. Additional weight can be added for a total of 700 lbs. Drives up to 60 posts an hour. Post Master 9000 Post Driver will drive posts that are up to 12 feet high.