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 1–15 mm apart. A 20 and 25-mm spacing are also given, and the one disk setting tests from 1–8mm, the other from 9–15mm. To change settings, just rotate the top disk until it clicks into place. Instructions and a protective carrying case are included.