As an economical alternative to chromoly, QA1 is the exclusive provider of carbon steel loader slot rod ends. QA1's EXM Carbon Steel Series male rod ends have increased cross-sectional thickness and are completely self-sealing and self-lubricating. The Nylon/PTFE injection molded race won't pound out like other styles and keeps dirt and debris out for excellent performance. BALL, 52100 Bearing Steel, Heat Treated, Hard Chrome Plated, Precision Ground, , RACE, Nylon/PTFE, Self-Lubricating, Self-Sealing, , BODY, Carbon Steel (Alloy Steel - Mfr.'s Option), Protective Coated for Corrosion Resistance, , EXCLUSIVE FEATURES, Metal to Metal Support for Heavy Shock Loads, Increased Cross-Sectional Thickness for Greater Tensile Strength.