The deck spacer did an excellent job of measuring the distance between decking boards. They are strong and have proven invaluable when leveling decking, especially long, 16 foot curved planks. The light yellow color was easy to see and was an added bonus. They offer a pitch of 1/8" or 3/16" which is recommended for installing decking. I find them to be superior to other smaller washers, including wedge washers, offered by other manufacturers. I highly recommend them.