Park Tool, TWS-1, Torx Wrench Set

The Park Tool TWS-1 Torx Compatible Wrench Set is a shop-quality, 8-piece collection of L-shaped star drivers engineered specifically for modern bicycle fasteners. As bicycle manufacturers increasingly transition from traditional hex bolts to Torx hardware to prevent stripping, this precision set serves as an essential workshop foundation.

Key Features

• Comprehensive 8-Piece Range: Includes the full spectrum of bicycle-specific star sizes: T9, T10, T15, T20, T25, T27, T30, and T40.
• High-Torque Industrial Steel: Heat-treated and through-hardened for a lifetime of commercial shop use, resisting twisting and rounding under heavy leverage.
• Chamfered Bit Edges: Precision-machined with bevelled tips to ensure a flawless, deep seat within the fastener head, significantly reducing the likelihood of cam-out or component damage.
• Dual-Ended Utility: Features functional star interfaces at both the long and short ends of the L-handle, allowing you to choose between maximum reach or high-leverage tightening.
• Portable Tool Holder: Comes packed in a robust, clip-in organizer that keeps the wrenches structured, highly visible, and easy to transport to trackside events.

Critical Bicycle Applications

• T25: The absolute standard size for standard 6-bolt disc brake rotors and many modern stem faceplates.
• T30: Universally utilized for high-torque chainring bolts on modern cranksets.
• T10/T15: Frequently found on hydraulic brake lever bleed ports and subtle derailleur adjustment screws.

User Sentiment & Performance

Amateur builders and professional mechanics rate this set at 4.8 out of 5 stars.

• Zero Tolerances: Reviewers heavily praise the precise machining, noting that the wrenches fit much tighter into star fasteners than generic hardware store sets, protecting soft titanium and aluminum bolts.
• Ergonomic Leverage: Users appreciate the optimized length of the L-profile, which delivers the exact leverage needed to confidently break loose factory threadlocked fasteners without snapping.