No matter how well you care for your bike, eventually you will knock a disc brake rotor out of true. This can happen from a crash, airline travel, bicycle shipping, or even just from stuffing your bike in the trunk of a car. Your disc brake then drags or pulses.
When it happens, there really isn't any subsitute for the correct tool. Feedback's Rotor Truing tool is built from forged, polished steel and should last a lifetime. With two different depths for working on rotors of various sizes, this tool easily brings your rotors back into perfect alignment.