One or more techniques and/or systems are disclosed for a nock device that may be used on an arrow. A top portion a nock device can comprise one or more pairs of string guide impression on its top surface, where the respective one or more pairs of string guide impressions may be symmetrically arranged on the top surface, with respect to each other. A first pair of string guide impression can be disposed along a first bisecting line on the top surface, and, if present, a second pair of string guide impressions can be disposed along a second bisecting line on the top surface. The respective one or more pairs of string guide impression can be configured to receive a bowstring, where the first pair may receive the bowstring in a first orientation, and the second pair, if present, may receive the bowstring in a second orientation.