The Kamui Diamond Slicer is a training product that helps with aiming for the player that uses the diamond system or just need the help improving on banking and kicking skills. Installation is very easy. Peel off the backing of one slicer decal at a time and follow, connecting each diamond around the table. Trim off excess decal wherever the decal overhangs on a pocket. The fit and finish is nice and clean. You can lift and reposition the decal but the decal basically has one life; reposition sparingly. ONLY FOR 9 FOOT TABLES.