Anodized aluminum. Folds up for easy storage. Hinge guards prevent pinching. 2.5" wide steps with anti-slip tread. Standoffs for support against transom or hull. May require drilling to mount to boat. Handle Depth - 12.25". Step Height - 12.5". Step Width - 12.5". Step - 3. Dimensions - 18"L x 46.6"H x 21.75"W.