The HP Tools E-Track MX Wheel Chock is used with the HP Tools E-Track Rail to help secure and stabilize the front wheel of your dirt bike at 90- or 45-degree angles. Made from heavy-duty steel and powder coated black for a durable and professional look. Made from heavy-duty steel. All hardware for installing the MX Wheel Chock included. Notes: For best results, install your E-Track rail at 14.5" from the floor and snap in the wheel chock and tie-down your dirt bike. Must have the HP Tools E-Track Rail (sold separately). Tie-downs sold separately.