KneeBlades® are designed for any job where you are required to be on your knees. High-quality KneeBlades® allow for more balance, flexibility, and mobility. The three-wheeled mobile base allows for full 360-degree turning capability, without lifting from the floor. Close to the ground knee roller design minimizes back stress. With the push of a button, you can go from knee blade to knee pad.
https://www.youtube.com/watch?v=rD7PzdO4B4s