Blades are divided in three categories according to the material hardness that are blades made of:
Soft blade - great control and manageability of the ball, suitable for more technical players, ideal for strikes by pulling, smooth pass on. Choice for players that like to play with the ball and also for shooting from a closer distance. When shooting by percussion the tip of the blade can "contort" and the shoot is not accurate. Mark on the blade is SB.
Medium-hard blade - most used type of the blade, which preserves great control over the ball and also allows sharp shooting. Universal hardness for most players. Ideal for combination of technical style and shooting by wrist or pulling. For occasional golf shooting.
Hard blade - blade from hard material allows harder shoot by percussion, does not contort and can stay in its production shape for longer time. Hard material requries skill in receiving pass on, because the ball tends to bounce. Ideal for hard shooting by percussion from longer distance. Mark on the blade is HB.