Most callaway diablo edge irons in the market are low compression ratings. These types of compression are suited for lower swing rate players to achieve a better distance.
These are the small depressions on the diablo edge irons which we so commonly see nowadays. These dimples improve the flight trajectory and enhance greater carry and distance. The difference between the dimples from one golf ball to another is the size and the depth. On a general guideline, a shallower dimple from the appropriate depth will increase the height of trajectory and a deeper dimple will reduce the height trajectory. All affects the distance and type of callaway edge irons roll you want to have after landing.