25702 - STURDY - 2x4 WALL JACK (500lb capacity)The Wall Jack is used to raise walls and beams, and tighten flooring and decking. Made of heavy duty, malleable cast iron, the wall jack rides up and down on a 2 by 4 foot pole, working like a car jack for dozens of construction uses. The Wall jack has a capacity of 500 pounds with the use of a 2x4 (actual measurement is 1" by 3") made of clear, straight grained fir wood, free of knots and defects. The jack is intended to meet OSHA safety regulations