A groove measuring bore head is designed to determine the precise size of a groove. This specialized type of bore head is applicable in situations when there is a groove on the interior of a part and you need to measure its size. There are a number of different measurements involved in this process, and the groove measuring bore head takes care of them all, leaving you with just the measurement you are looking for. The entry diameter, measured diameter, head clearance diameter, depth of clearance, width, and the length at which the measurement is required all play a role when using the groove measuring bore head. Simply insert the bore head into the part that contains the groove and the automatic display will report the size of the groove you are aiming to measure.