The Grip 4/6 Direct Mount Kit lets you mount your Kuat Grip rack on your roof-rack crossbars with T-channels. The kit includes 2 high-profile mounts when you&';re carrying skis and snowboards with tall bindings, and it also includes 2 low-profile mounts when you&';re looking to go as aero as possible. Features Compatible with Kuat GRIP 4 and GRIP 6 Ski/Snowboard Racks Designed to allow the GRIP to be mounted to crossbars with a t-channel Lifetime Warranty