The Park Tool AWS-7 is a Y shaped 3 way wrench with a 4 mm hex, a 5 mm hex, and a T25 Torx compatible driver.

What it's for

The 3 way wrench puts three common bolt sizes in one tool that sits in your palm. Park Tool says these three sizes are the ones used most often on modern bikes, and that the tool is suited to adjusting brakes, handlebars, stems, and similar parts. The 4 mm and 5 mm hex cover most stem, seatpost, and accessory bolts, and T25 is the usual size for disc rotor bolts and many brake and drivetrain fittings.

Features

• Y shape: fits in the palm and gives good leverage
• Tips: heat treated industrial tool steel with chamfered ends for a precise fit in the bolt head
• Body: glass fiber reinforced polymer center

Compatibility

• Fits: 4 mm hex, 5 mm hex, and T25 Torx compatible fasteners
• How to check yours: test the wrench in the bolt head. It should seat fully with no wobble. A loose fit means the wrong size and can round out the bolt

Specs

• Sizes: 4 mm hex, 5 mm hex, T25 Torx compatible
• Tip material: heat treated tool steel
• Body material: glass fiber reinforced polymer
• Park Tool item number: AWS-7