The Arrowmax AM-220021-O Nut Driver is built for Mini 4WD enthusiasts needing dependable hardware control. Its two sizes, 4.0MM and 4.5MM, match common nut dimensions found across Mini 4WD builds.
The bright orange handle is easy to spot and shaped for comfortable turning during extended setup sessions. The grip helps reduce slippage when making small adjustments trackside.
This tool suits MS, MA, AR and comparable chassis, letting you tighten wheel nuts, body screws and accessory fastenings with the correct fit to avoid damage.
While the driver is not a tuning upgrade by itself, using the right size tool supports exact alignment and consistent hardware tension, which contributes to smoother runs.
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