The i-1 Big Boy is the most powerful shaft in the i-Shaft series. Its special taper, wider shaft diameter and Triple-Layer Carbon Fiber core make it the ideal choice for breaking and jumping with extreme control.The Navigator Break Impact is a hybrid phenolic break tip. Most phenolic tips are designed to generate power, but at the cost of cue ball control. The Break Impact tip’s hybrid construction provides tremendous cue ball control without sacrificing power. This makes it ideal for breaking and jump shots.