The Guardian Fall Protection 3-Rung Ladder Jack is MIG Welded and possesses a riveted construction for superior strength and durability. It is set-up over 3 consecutive ladder rungs, can be used on either side of a ladder, and is ideal for painting, siding, and repair applications. This jack is easy to both install and remove, and will even accommodate planking up to 18 inches wide when used in combination with a paired Ladder Jack, and installed and used in accordance with all applicable OSHA regulations.