Featuring a pentagonal shape for enhanced spin potential, ALU Power Spin is perfect for baseliners looking to add spin and control to their game. This string is the shaped version of ALU Power, where it ties in its incredible precision and feel characteristics with relentless power. It contains the same championship-worthy materials as ALU Power, which provides exceptional spin, feel, and comfort. Many players use this string as a hybrid, pairing it with a softer, powerful string in the crosses. Luxilon ALU Power Spin 127 Tennis String Set | Christy Sports