Six-Wheeled Stair Climber 16 December 2020, 19:47 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! See a real stair climber: /watch?v=0PpNLD3TrdE It needs less pulling force in comparison with a conventional two-wheeled hand truck: /watch?v=bCXaVspSXKM « previous mechanism Hand Shearing Machine next mechanism » Pair of Compasses load comments Please enable JavaScript to view the comments.