Chock for Two Adjacent Wheels 12 April 2019, 19:30 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! Turn orange screw clockwise to force blue pads (made of wood) on the wheels for chocking. The pink part is a nut. « previous mechanism Straight Line Drawing Mechanism b next mechanism » Precise Height Adjustable Table load comments Please enable JavaScript to view the comments.