X tools essential mini torque wrenchthe x tools essential mini torque wrench has a pre set torque setting of 5nm making it ideal for setting the correct bolt tension on most types of seatpost clamps stem bolts and other components such as brake lever clamps and derailleur bolts a vital tool to have if you are regularly tightening carbon fibre components or have components that clamp on to carbon bars or carbon frame features accurately tighten hex bolts to a setting of 5nm set even tension o