When performing depression studies, the treatment spot is normally based on the standard 5 cm rule anterior to APB motor cortex. Other standards e.g. 6 cm is supported too. With marking plate for C-B60 coil mounted, the DLPFC ( left dorsolateral prefrontal cortex) spot is easily located during the motor threshold determination. C-B60 has the same magnetic field as the Cool-B65 A/P coil's active side.