The traction assist handle allows you to use your hands to control the speed of Personal Pace mowers, instead of your walking speed. The fixed assist handle allows you to squeeze the traction bar to adjust the mower speed without changing walking speed. It is helpful in situations when turning tight corners and mowing on hills. When it comes to reliability, Toro delivers replacement parts designed to the exact engineering specifications of our equipment. For peace of mind, insist on Toro genuine parts.