src: waxbuddy.com
A wax comb is a tool used in the maintenance and removal of surfboard wax on a surfboard. Wax combs typically have features such a jagged or toothed edge and a straight, relatively sharp edge. The jagged edge is used to create textured grooves for improving the traction of the wax and the straight edge is used for scraping off unwanted wax. In addition to the straight edge for wax removal, some wax combs even have an inwardly curved edge for the rails (such as Mr. Zog's Sex Wax "Sex Comb"). Additionally, wax combs can have features such as fin key, bottle opener or a snap for portability (attachment to interior pocket loop, lanyard or leash attachment lanyard).
Video Wax comb
References
Source of article : Wikipedia