The Boss TRP07899 is a 9' Steel Trip-Edge Super-Duty Plow. BOSS Trip-Edge snowplows are engineered to power through the heaviest snow and any obstacles that come with it. The extra-rigid moldboard and trip-edge technology ensure that only the cutting edge trips when you hit an obstacle, so you won’t lose the load you’re pushing. Trip-Edge snowplows feature four adjustable trip return springs, so you can customize the trip spring tension for the job at hand.