The MiniProf Brake instruments for axle and wheel mounted discs are single head instruments. With the TwinHead Brake it is now possible to measure both sides of the axle mounted discs.
The TwinHead Brake instrument is placed similar to the axle mounted instrument. The major difference is the two heads that allow both sides of the disc to be measured without moving the instrument. This gives a much more accurate relation between the inner and outer disc sides and enables an even more precise calculation of the brake disc width.