Park Tool ATD-1.2 Adjustable Torque Driver angled view, 4–6 Nm bicycle tool
Front view of Park Tool ATD-1.2 Adjustable Torque Driver for bicycles
Park Tool ATD-1.2 Torque Driver with included 3mm, 4mm, 5mm hex and T25 Torx bits stored in handle
Cyclist using Park Tool ATD-1.2 Adjustable Torque Driver to tighten bike stem bolt
Park Tool ATD-1.2 Adjustable Torque Driver angled view, 4–6 Nm bicycle tool
Front view of Park Tool ATD-1.2 Adjustable Torque Driver for bicycles
Park Tool ATD-1.2 Torque Driver with included 3mm, 4mm, 5mm hex and T25 Torx bits stored in handle
Cyclist using Park Tool ATD-1.2 Adjustable Torque Driver to tighten bike stem bolt

Park Tool ATD-1.2 Adjustable Torque Driver (4–6 Nm)

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  • $99.99
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The Park Tool ATD-1.2 is a shop-quality adjustable torque driver designed for precision tightening of bicycle components. With carbon fiber and lightweight parts becoming more common, it prevents overtightening and damage by delivering consistent, accurate torque.

  • Adjustable torque settings: 4, 4.5, 5, 5.5, or 6 Nm

  • Loud “click” sound indicates when torque limit is reached—won’t turn further

  • Includes ¼" hex drive bits: 3mm, 4mm, 5mm hex, and T25 Torx®-compatible

  • Bits store neatly inside the handle for convenience

  • Durable all-metal internal construction for years of accurate use

  • Comfortable, ergonomic molded composite body

  • Operates in tightening (clockwise) direction only

  • Assembled and calibrated at Park Tool’s factory in St. Paul, Minnesota

This tool is essential for stems, seat posts, clamps, and other small fasteners on modern bicycles.