This sturdy work platform attaches easily to almost any type of ladder and provides a comfortable place for workers to sit or stand. The platform consists of a hinged, welded pipe frame with a marine plywood platform that is coated with a nonskid finish. It can be used on all aluminum or fiberglass ladders with aluminum rungs with diameters from 1 1/4″ to 1 5/8″ inclusive…on either round or “D” rung types. Built to provide years of heavy duty use, the platform features hooks and unique spring loaded latches that lock the platform frame securely to the rungs of the ladder. For added convenience, the platform is designed to allow easy installation with one hand, leaving one hand free to grip the ladder. The platform folds down easily to allow convenient storage. Rated for a maximum of 375 lbs. Weight: 11 lbs. Dimensions of platform: 9 1/2″D x 18″ W x 3/4″ H. Folded: 15 1/2″D x 18″W x 3″H.