Along with a stout, 800-pound capacity, this pivoting jack provides 10" of travel and 21" of lift. It has a heavy-duty, poly wheel; reinforced wheel fork; zinc-plated tubes inside and out; solid cast gears and a two-pin swing-up release. Fits tongues up to 3" x 5". Zinc-plated mounting hardware.
used it om my 14'aluminum boat trailer wich the front end wight is less then 100lbs with me standing in the boat and my wight is 155lbs the mounting bracket crumbled. its rated for up to 800lbs but the bracket gave up on under 300lbs so i just used it for parts to fix my old jack