Hex wrenches get more use than any other tool in a bike shop. Stem bolts, seatpost clamps, brake calipers, rotor mounts, water bottle cages—nearly every fastener on a modern bicycle takes a hex key. The Park Tool THH-1 set addresses the leverage problem that comes with standard L-shaped hex wrenches: when a bolt is seized or needs real torque, those short handles leave you struggling. The sliding T-handle design lets you position the handle anywhere along the shaft, giving you the mechanical advantage to break stubborn fasteners loose without switching to a completely different tool.

The set covers 2mm through 8mm sizes, which handles essentially every hex fastener you'll encounter on a bicycle. Each wrench features a long shaft with a sliding crossbar that moves freely until you apply rotational force—then it locks in place. Slide the handle toward the bit end for high-speed spinning when a fastener is already loose, or position it at the far end for maximum leverage on stuck bolts. The crossbar rotates 360 degrees around the shaft, so you can work in tight spaces where a fixed T-handle would hit the frame or components.

Ball-end tips on the long side of each wrench allow entry angles up to 25 degrees off-axis. That matters when you're reaching a bottle cage bolt that's partially blocked by a frame tube, or accessing a derailleur limit screw at an awkward angle. The ball end gets you in; then you can flip to the straight end for final tightening where you need full contact with the fastener.... Read More