Ytex Quadro Twist has MASSIVE spin potential. Thanks to a soft polyeolefin additive, this one comes with above average comfort for a poly-based string. With its twisted square profile, Quadro Twist puts a tight grip on the felt and allows the player to impart some serious RPMs. Those who want great control without excessive shock on off center hits should like this one. A great option for the poly player who places a premium on spin.