Park Tool TWS-3C Torx Compatible 3-Way Wrench
The TWS-3 is a Torx compatible 3-way wrench. T10, T25 and T30 wrench sizes in our classic three-way "Y" design. Useful for disc rotor bolts (T25), chainring bolts (T30), and hydraulic brake work (T10).
I got sick of of using the little allen torx key that comes free with a lot of brakes/rotors. This tool makes installing rotors and servicing your hydraulic brakes a breeze. Its a park tool so its well built and worth the purchase. If you work with disc brakes a lot I would definitely recommend adding this to your toolbox.