JIF Marine Stationary Finger Pier Dock Ladders. The finger pier ladder is designed to have minimal footprint on the dock pier.  Quality made marine dock ladders built using heavy duty 6005T-5 marine grade aluminum which is 22% stronger and more resistant to corrosion than traditional aluminum dock ladders built by all the other competitors (using 6063T-5). Choose from Standard 2" Steps and the more comfortable 4" Wide Step.