Inconsistency with brake disc sizing is a significant ongoing frustration for mechanics . A vehicle may be the same year, same model yet have three different sizes of disc for the rear brakes. Often even a VIN lookup may give the wrong size. This tool enables technicians to quickly and efficiently ensure they order the correct discs without requiring the wheel to be removed. The diameter tool comes in a kit with the thickness tool.

The idea for the rotor reader was conceived by Dr. Esnouf when he was told by a certain dealership that his brake discs were low on his car after 5000kms. Needless to say it is easily the best tool on the market for this task. The device’s patented spring loaded and magnetised design ensures high degree of repeatability as well as not requiring wheels removal to take measurements.