HD⚡SWITCH: Engineered Performance TOUGHER: 304 Stainless Steel is Harder and Stronger than the Original Axle and Will Last Longer. These Axles Also Have a Higher Yield and Tensile Strength. STAINLESS STEEL: Hard 304 Stainless Steel is a HUGE OEM Upgrade. SMOOTHER: Stainless Steel Will Not Score as Easily as the Softer Factory Axle and Will Never Rust. Scoring or Rust Creates Drag and Wear; Making Stainless Steel a Long-Lasting Smoother Option. This Kit Includes Premium Wear Resistant Bushings and 100% 304 Stainless Steel Axle(s). If Your Machine Needs Wheel Bushings, it is Very Important to Check Your Axles for Wear or Rust. Factory Axles are Much Softer and Will Normally Have Rust. It is Highly Likely That the Old Bushing Has Damaged the Axle. A Damaged, Rusted or Worn Axle Will Significantly Shorten the Life of The Replacement Bushings. HD Switch Axles are Made of Hard Seamless 304 Stainless Steel (304SS) and Will NEVER Rust. 304SS is Harder, Tougher and Will Last Much Longer Than a Soft Carbon Steel Factory Axle. Our Bushings are Made of a Special Blend of Plastic to Reduce Wear.