Federal Stone DQ CUT OUT 18" White DQ Series Coping with 6" x 18" DM Cut Out. Also featuring the "World's Safest Pool Edge", the DQ® mimics the AQ® style stone. A row of raised diamonds runs across the middle of the stone. The diamonds create a unique and noticeable appearance. In this series, 42 straights can be placed on a pallet to take advantage of pallet pricing.