Bulldog’s 10,000 Pounds support capacity square jack “fills the gap” between 8,000 Pounds and 12,000 Pounds square jack product offerings. If the existing 8,000 Pounds support capacity square jacks are too small or the 12,000 Pounds support capacity square jacks are too big, look no further – your application and pricing requirements have been met. This is the highest quality and best performing jack available in the marketplace today, a total balance between capacity, speed, and effort.