The Touch-Test Two Point Discriminator is designed to be used for neurological examinations to determine how finely innervated an area of skin is. This product features rounded tips that are spaced at standard testing intervals from 115 mm apart. A 20 and 25-mm spacing are also given, and the one disk setting tests from 18mm, the other from 915mm. To change settings, just rotate the top disk until it clicks into place. Instructions and a protective carrying case are included.