Applying the correct torque to your cycle components is essential for a safe and serviceable bike the lifeline essential torque wrench helps you ensure that the fittings on your bike are tightened to the correct torque and that clamping forces are distributed evenly across clamping surfacesthis helps prolong the life of high end componenty and prevents damage from over tightening the lifeline essential torque wrench is supplied 3 4 5 6 8 10mm hex heads t25 and t30 torx heads with and e