The TrackStar is a quick connect wheel chock for standard truck beds and flat floor trailers. Super strong patented Lock N' Load System for motorcycle tires up to 5-1/2 inch width. Each wheel chock comes complete with track, hardware and installation instructions. To install, position chock stud feet into track, press down and slide chock forward. To remove, pull up on the top mounted "plunger" and slide chock out of the track. No tools required.