Add the SmarT-Slot™ Kit 3 to the OffGrid™ cargo basket or DoubleHaul™ rooftop fly rod carrier for an even sleeker profile on T-Slot Crossbars. This easy hardware kit replaces the standard mounting hardware, and directly attaches into a T-slot channel on your crossbars. It works with all Yakima® T-slot crossbars as well as most other T-slot crossbars.