In response to customer demand, RPM have release a set of threaded hinge pins for the Traxxas X-Maxx monster truck. They work with stock Traxxas A-arms as well as RPM A-arms, are manufactured from stainless steel and are tough as nails. The hinge pins are 4mm x 56mm and work in the outer A-arm hinge pin location. Each kit comes with four threaded hinge pins and four M3 locknuts. The hinge pins can be used as a replacement for CEN GS025 hinge pins as well but RPM versions use a 3mm locknut instead of a 4mm version.