This Luxilon ALU Power 125 12m Set is the standard for playable durability in a co-polyester tennis string. Extremely popular on the ATP Tour and ideal for big hitters and string breakers of all playing levels. It allows for a full swing to be taken at the ball without a loss of control. Co-polymer nylon, fluorocarbon resin, and aluminum fiber construction set Big Banger ALU Power apart from the competition. It is also the most valued strings on the professional circuit that guarantees an excellent and perfect control combined with the huge power.