It’s a pre-calibrated torsion ratchet tool constructed from durable, lightweight machined aluminum. With the handle removed the wrench packs up neatly into a compact, molded EVA case and comes equipped with six hardened steel bits, including 2.5, 3, 4, 5 MM hex bits and T20, T25 Torx bits. A custom Composite Matrix key is included to help easily adjust the wrench’s torque setting. It’s adjustable between 2 – 6 Nm in .5 Nm increments and features a magnetic bit holder. This is the ultimate portable bicycle torque wrench for professional level shop use or on-the-fly adjustments.