Boss STB03167 8' Straight Super Duty Plow Blade. BOSS Super-Duty straight-blade plows RESTORE ORDER with unsurpassed reliability and strength. BOSS SmartShield baked-on powdercoat paint finishes with zinc primer resist corrosion. Heavy-duty push frames and push frame attachment bars and optimized blade curl are standard on every BOSS straight-blade. For added strength to take on nature’s worst, BOSS Super-Duty straight-blades boast reinforced moldboards for increased blade rigidity and increased durability.