Torx Screwdriver Set

The straight-shaft Torx format in a six-piece set. T10, T15, T20, T25, T27, T30, on a long-axis screwdriver handle that reaches into places a T-handle or Y-handle can't fit. The set that covers the Torx span from electronic-shifter fasteners (T10) through to current Shimano and SRAM chainring bolts (T30), in a one-tool-per-size layout.

The straight-shaft screwdriver format is the right call when the bolt sits deep in a recess that a cross-handle can't enter: small fasteners on shifter clamps, the deep-set hardware on derailleur hangers, the recessed Torx bolts that hide behind frame or component covers. The shank runs in a straight line from the handle to the tip, so the tool can sit at full bolt depth with the handle still rotating freely in your hand.

Each screwdriver has a hex bolster at the base of the handle. Slip an open-end wrench onto the bolster and you can deliver high torque without the handle's grip becoming the limit. That's useful on the few Torx fasteners that show up at the high end of the working-torque range (some saddle clamps; chainring bolts on certain crank designs). The handle itself is a three-material grip composition: a hard core for torque transmission, a softer outer for comfort under repeated use, and a flat strike face that gives you something to brace against in a bind.

Sizes included

T10, T15, T20, T25, T27, T30.

• T10: Di2 and AXS small fasteners; some derailleur cable-anchor bolts
• T15: SRAM brake-lever clamps on some models; small chainring rivet hardware
• T20: Some saddle clamp bolts; some shifter clamps
• T25: 6-bolt disc rotor bolts (the most-reached size in the set for any disc-brake rider)
• T27: Some SRAM disc-brake hardware; some saddle-clamp interfaces
• T30: Current Shimano and SRAM chainring bolts; some crank-arm fixing bolts

Specs

• 6-piece Torx screwdriver set: T10, T15, T20, T25, T27, T30
• Hardened, tempered steel blades
• Blackened tips for corrosion resistance and recess fit
• Hex bolster at the handle base for wrench-assist torque
• Three-material composition handle with hanging hole
• Size and tip type marked on each handle
• Trivalent chrome plating to ISO 1456:2009 on the non-tip shank surfaces
• Manufactured in Slovenia

Built in Zreče, Slovenia

Unior has been forging hand tools in Zreče since 1919, and is the official technical partner of multiple World Tour and downhill teams. The straight-shaft screwdriver is the format the line uses for deep-recess fasteners where a T-handle or Y-handle can't reach; the hex-bolster geometry is shared across the Torx and the standalone metric hex screwdriver lines, so the same wrench-assist trick works in either set.

Pro tip from our mechanics

The hex bolster does more than just give you a wrench-assist option. It's also a tell that the tool was designed for working-mechanic use rather than display: a screwdriver without one assumes you'll never need more torque than your grip can deliver, which on the high end of the Torx working-torque range (think T30 on a chainring bolt, or T25 on a thermally-cycled rotor that's seized) just isn't true.

For the full Torx-to-fastener map on a typical bike, and when the straight-shaft Torx format beats a T-handle or Y-handle for a given size: Hex and Torx wrenches: how to pick the right tool for the job →.