Unless you already have a gap and a wedge of sand that you love, it makes sense to get both with the set. The wedge gap fills the yard gap between the launch wedge and the sand wedge. A golfer who hits his throwing wedge about 100 yards usually uses a wedge of sand between 70 and 80 yards, therefore, “the gap.” You will also find that the wedge of separation is invaluable in throwing shots where a wedge of sand will not reach at all. While many players think that the sand wedge is a specialized club that must be purchased separately, almost all manufacturers manufacture top-notch sand wedges today. The matching sand wedge will give you more consistency from the street and, of course, it will also get you out of the sand quite well.