QA1’s XM Chromoly Steel Teflon Lined Series Male Rod Ends. XM Series rod ends are completely self-sealing and self-lubricating because of their Nylon/PTFE injection molded race that keeps dirt and debris out. 52100 Bearing Steel Heat Treated Hard Chrome Plated Precision Ground RACE Nylon/PTFE Teflon Lined Heat Treated Protective Coated for Corrosion Resistance EXCLUSIVE FEATURES Metal to Metal Support for Heavy Shock Loads Increased Cross-Sectional Thickness for Greater Tensile Strength