Great for teaching your linemen and backs your offensive splits. Running backs can learn the holes by running plays without the offensive line. Made of heavy-duty vinyl, the marker features weights at the ends and center to keep it flat on the ground. The labeled, removable positions attach to a hook-and-loop fastening strip, allowing you to set up your own custom formations. 39' overall length, 10-1/2 wide black strip with 36 yellow position indicators labeled with 9 letters.