Extension hooks can be used to attach our master equipment non-skid pet tub stairs; Attach easily to the ends of the stairs and expand 2-inch to 5-inch past; Made of 1-inch square steel; A powder-coated dark gray lip hangs 2-1/2-inch over the edge of the tub; Measures 6-4/5-inch length by 2-1/2-inch height by 6-1/2-inch width