Tamiya TRF417 V5 Swing Shaft Caps. These optional swing shaft caps are compatible with most of Tamiya's differential joints using universal shafts. At 3.5mm thick, they are 0.5mm thicker than standard parts. These swing shaft caps enhance durability, enabling them to handle high-powered motors. Package includes one Tamiya TRF417 V5 Swing Shaft Cap Set.