The Buyers 12" Carbon Steel Heavy Duty Square Jack is the perfect tool for any heavy duty job. It has a travel distance of 12" and a capacity of 12,000 lbs. The square construction ensures maximum strength and durability, while the corrosion resistant black powder coated finish ensures long lasting durability. The spring return mechanism makes retraction and expansion easy. The heavy duty steel construction provides maximum strength and durability. FleetPride is your First Click in Heavy Duty®.