it fits the TRX-4 exactly and installs during standard axle service

Traxxas 8228 Axle Shaft Front (Left) /Drive Pin TRX-4

5mm sway bar and one rear 2

A core component for adding working signals to any Kato Unitrack layout

grasslands

Powerhobby Pro Series Magnetized Allen Hex Tool Set Metric 3mm Wrench 3.0 Tool Sets it fits the TRX-4 exactlyPowerhobby Pro Series Magnetized Hex Tool Set Metric 3mm Tackle any RC maintenance or assembly job with our new Allen Hex Wrench (Metric). The Allen Hex Wrench Set features large, knurled handles that have both color coded collar and machined indicators for quick driver size identification. Features: Stylish lightweight aluminum handle design Color coded collars on the handle Sure grip handle 22mm diameter handle 100mm handle length HSS Magnetized