Park Tool TW-6 Torque Wrench
With today's lightweight components, torque wrench use in the shop is no longer an option it's a must for every mechanic. The TW-6 is a high quality, ratcheting, click type torque wrench that accurately measures and applies the proper amount of torque to a component's threaded fastener(s).
If you twerk nuts on farbon ciber, then this wrench or one like it is essential. Make sure you always reset it to the lowest setting since remaining under tension screws with the calibration.