Park Tool Hex wrenches made from industrial tool steel, hardened and tempered for shop use. Available in Y, L-Shape and folding versions -The TWS-3 is a star-shaped Torx compatible 3-way wrench. T10, T25 and T30 wrench sizes in a classic three-way “Y” design -Useful for disc rotor bolts (T25), chainring bolts (T30), and hydraulic brake work (T10).