The TWS-3 is a Torx® compatible 3-way wrench. It features T10, T25 and T30 wrench sizes in Park's classic three-way "Y" design that was first introduced over 20 years ago. Y design gives plenty of leverage and promotes fast and accurate adjustment. It also fits nicely in the hand. The TWS-3 is useful for disc rotor bolts (T25), chainring bolts (T30), and hydraulic brake work (T10). This tool is one of the staples of a modern workshop.