Hardened Chrome Steel Hinge-Pin Slash/RustlerDetails: Hardened chrome plated steel hinge pin kit specifically designed for Electric TRA 2WD Slash, Rustler, and Stampede Centerless grinding process ensures precise dimensions and smooth surface for improved performance Machined from high quality #45 carbon steel and heat treated for increased durability Nylon insert lock nuts at each end prevent hinge pins from coming loose Kit includes multiple sizes of hinge pins and lock nuts for versatile use