8-piece T-Handle Hex Set

The hex set that lives on a workbench. Eight sizes (2, 2.5, 3, 4, 5, 6, 8, 10 mm) on balanced T-handles, each shank long enough to reach into the deep-set bolt locations a typical bike presents, each handle sized to the bolt's working-torque range. The kit that covers almost every hex fastener you'll meet on a road, gravel, or MTB build.

The T-handle format puts the bolt on the long axis of a two-handed handle. You can spin the bolt in and out with the shank rolling between your fingers while one hand holds the cross-bar; for the snug-down, both hands on the cross-bar give you the leverage to bring the bolt to spec. The geometry beats an L-key for repeated work on the same fastener, which is exactly the work a home-shop hex kit gets called for.

The shanks are chrome-vanadium steel, hardened and tempered, with black-oxide tips for corrosion resistance and a tight fit into the hex recess. The handles are glass-fibre-reinforced polypropylene; the cross-bar's grip texture and balanced weight let the tool spin between your fingers when speed matters and stay seated when torque matters.

Compatibility

Eight sizes covering the bike-relevant metric hex span:

• 2 mm: derailleur limit screws on most current Shimano and SRAM mechanical groupsets; small grub screws on shifter index assemblies
• 2.5 mm: disc-brake caliper banjo bolts on some hydraulic systems; small saddle-rail and shifter-clamp fasteners
• 3 mm: older shifter and brake-lever pinch bolts; bar-end plug screws
• 4 mm: stem face-plate bolts on many bars; brake-lever clamps; bottle-cage bolts; most SPD cleat bolts
• 5 mm: stem steerer-clamp bolts; seatpost binders; saddle-rail bolts on most clamps
• 6 mm: disc-brake caliper-mount bolts; some chainring bolts on older designs
• 8 mm: pedal threads from inside; some crank-fixing bolts on square-taper interfaces
• 10 mm: Campagnolo crank-spindle bolts; some older bottom-bracket interfaces

Specs

• 8 T-handle hex wrenches: 2, 2.5, 3, 4, 5, 6, 8, 10 mm
• Chrome-vanadium steel shanks, hardened and tempered
• Black-oxide tip treatment for corrosion resistance and recess fit
• Trivalent chrome plating to ISO 1456:2009 on the non-tip shank surfaces
• Glass-fibre-reinforced polypropylene T-handles
• Hex keys manufactured to the ISO 2936 dimensional standard for metric hex keys
• 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 T-handle hex set is the reach-for-it format for shop-pace work; the same chrome-vanadium and tip-treatment specifications that ship on the standalone professional T-handles are what's in this set, in the eight sizes a typical bike actually needs.

Pro tip from our mechanics

Two things determine how long a hex set lasts in a shop: the steel grade, and the tip's tolerance to the recess. A worn tip rounds the recess of a fresh bolt on first contact, which means a hex set's working life ends not when the steel breaks but when the tip fit loosens. Our hex keys are manufactured to the ISO 2936 dimensional standard for across-flats sizing; the tight tip-to-recess fit is what keeps the set working longer.

For the trade-offs between T-handle, L-shape, Y-handle, and three-way formats, and which sizes need a long-arm L-key for high-torque pulls beyond the T-handle's range: Hex and Torx wrenches: how to pick the right tool for the job →.