Atwood stabilizer jack. 650 lbs. work capacity. 1,000 lbs. support capacity. Retracted 11.5" and extended 17.75". Simply pull on the leg assembly until the tab disengages from the slot.  Swing down and snap into position.  Push the lever on the bottom to drop the leg to the ground.  Reverse these steps for storage. 

 

The leg extends a full 6".  The jack is infinitley adjustable from its retracted and extended length.  This minimizes time and effort to level your camper.

 

Rectangular, steel tubing gives a support leg with high stength and minimal weight.  A four-inch square steel foot pad completes the rugged unit.