Reese Towpower a-frame trailer jack features rolled acme threads and anti-friction thrust bearings for easy winding. It is built with high strength tubing for durability. Ideal for multiple agricultural and commercial applications, this standard A-frame jack features an retracted height and measures from the mounting bracket to the top, excluding the handle. A-frame models have black painted outer and inner tubes, all other models have black painted outer and clear zinc inner tubes.