This 1 pair of heavy-duty semi-trailer fender hanger set, equipped with beveled spring fender hangers and bolt-spaced fender hangers plus reflective strips, is tailored for semi-trailer trucks and fits various key application scenarios. It works exceptionally well for semi-trailer trucks engaged in cross-border freight transportation, which often travel through multiple states or countries with long stretches of highway and varying traffic densities; the heavy-duty build of the hangers ensures fenders stay securely attached even during continuous high-speed driving for 8-12 hours, avoiding fender displacement caused by constant wind pressure and road bumps, while the reflective strips boost the truck's visibility in foreign road environments where traffic rules or lighting setups may differ, helping local drivers spot the large vehicle in advance and lowering collision risks. For semi-trailer trucks used to transport agricultural products like grains, fruits, or vegetables between rural farms and urban distribution centers, which frequently pass through unpaved rural roads with potholes and loose soil, the bolt-spaced design enables accurate and tight installation, keeping fenders in position to block mud and soil splashes from soiling the truck's body or the transported goods, and the beveled spring hangers absorb shocks from uneven roads, reducing damage to both the hangers and fenders from repeated jolts. It is also ideal for semi-trailer trucks involved in waste or recycling hauling, which operate in both urban neighborhoods and suburban waste facilities; these trucks often make frequent stops to collect waste, and the sturdy hangers maintain fender stability during frequent start-stop cycles, preventing loosening, while the reflective strips enhance visibility when the trucks navigate narrow residential streets at dawn or dusk, ensuring safety for pedestrians and other small vehicles nearby.