AnchorTrax™ Tie-Down System is the ultimate payload security system...it's easy to install and use. Simply mount the 12 in. L x 1-1/4 in. W tracks on the rails or floor of your pickup/trailer bed. Snap the sliding loop anchors securely in any of twelve different positions on each track (countersunk holes eliminate unusable tie-down positions). Use your tie-down cords or straps (not included) to secure the load. Includes two tracks, tow heavy-duty loop anchors (additional anchors available, sold separately ZX445792), two 5 in. long mounting plates and four mounting bolts.