The Ladder-Aide is the quickest, easiest and safest way to use your extension and combination ladders on stairs. It?s a compact and portable unit that doesn?t require permanent installation on your ladder, can easily be moved from stair to stair and can be used with a variety of ladders. Made for professionals and perfect for the everyday handyman, the Ladder-Aide Pro is compatible with most aluminum and fiberglass ladders, from Type 3 to Type 1AA. With an anti-skid surface and micro-adjustable height (to within 1/8 inch), it creates a stable, level base for use on stairways. Its rugged construction of high-grade aluminum and steel and heavy-duty design mean it?s built to last. The original Ladder-Aide was designed to meet the size and weight standards of Type III and Type II aluminum ladders, good for most homeowners and painting contractors. It uses more aluminum to remain light-weight and all the components pack directly into the platform.