Although our sturdy fiberglass Swim Platform can be used alone to help swimmers or skiers board, it includes built-in reinforcements so no backing plates are required for installation if you prefer to add a ladder. Handles are 1"dia. stainless steel tubing. All mounting hardware is included. Fasteners and caulk (sold separately) required for installation. Platform dimensions: 18"W x 14"D x 1"H. Capacity: 275lb.