Heavy-Duty Steel: 1" solid steel resists extreme wear, corrosion, and impact—ideal for long-haul trailers and box trucks. Exact Fit: 7/16" stem × 3.3" long, precision-machined for 1" tracks—smooth, quiet, wobble-free. Universal Use: Fits tractor-trailers, box trucks, vans, garages, and fleet shops. Tool-Free Install: Swap in minutes, zero downtime. Low Maintenance: Grime-resistant; light lube, long life.