There are two parts to the RaceDeckŒ locking system. All tiles on any given installation should ALWAYS HAVE THE FEMALE LOOPS GOING IN THE SAME DIRECTION. (illustration 1)    Illustration 1 (Right) CAUTION: If you inadvertantly rotate a tile 90­ it will snap into place (illustration 2) but you will not be able to complete the installation properly.    Illustration 2 (Wrong) ASSEMBLY Always begin the installation in one corner, pointing the female loops in the directions that additional tiles are to be added. See animation below.