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. These Oversize Rod Ends have a wider body and ball vs the standard style Rod Ends – 0.75″ vs 0.625″ widths.