At a glance you will be able to know exactly what size nut driver you are grabbing as each one has a special color coded ring and etched sizing on the shank

Genuine HPI Racing replacement part 107391

rear (right)

Compound: Sport—Firm

Part Number: LOS232019

Hot Racing Aluminum Threaded Front Bleeder Shock Bodies Arrma Typhon Senton Slot Car Parts At a glance you willHot Racing Aluminum Threaded Front Bleeder Shock Bodies Arrma Typhon Senton Hot Racing aluminum threaded Front shock bodies for 1 10 Arrma 4X4 vehicles. FEATURES: Threaded shock bodies for easy, precise, and consistent adjustment of ride height and shock pre load Bleeder screws for easy shock maintenance Spring collars feature an o ring to lock the collar in place to prevent unwanted movement CNC turned and machined 6061 T6 aluminum construction,