Keep your fleet running smoothly with these innovative Skid-Stopper trailer wheel skid indicators. This 4-pack of high-visibility yellow indicators provides an immediate visual alert when trailer wheels lock up or start skidding due to brake issues. Crafted from industrial-grade UHMW-PE plastic, these indicators maintain their integrity in both scorching heat and freezing temperatures without compromising performance. Each kit includes four M22 x 1.5 jam nuts for secure, reliable installation on commercial trailers. These indicators are an essential tool for proactive fleet maintenance, helping operators quickly spot potential issues before they lead to costly tire damage or unexpected downtime. Perfect for long-haul trucking operations and vocational fleets, these robust indicators are built to withstand the demanding conditions of heavy commercial use. Save time and money by catching brake problems early with these dependable visual warning devices. Compatible with standard commercial trailer configurations and designed for quick, straightforward installation. Proudly made in the USA, these skid indicators are built to meet the safety expectations of North American fleets.