A TSK file is a data file created by Printed Circuit Board (PCB) CAD tools such as Autodesk EAGLE. It contains layout data for the top silkscreen layer of the PCB. TSK files are saved in the RS-274X format, which is the most common and contemporary Gerber format.

The TSK file allows you to save the silkscreen printed on a PCB. This includes the text-based information printed on top of a PCB that can be read by humans. The information may be test points, company logos, switch settings, component identifiers, or part numbers. NOTE: The Gerber format was originally developed by Gerber Systems but is now maintained by Ucamco.

A TSK file contains a skin used by TTPod, a music player for Android devices. It stores a skin for the player that configures the appearance of the TTPod player. TSK files are stored in the /SDCard/TTPod/Skin directory.

TSK files are used for customizing the TTPod app. The file is used for storing default skins or skins created by a TTPod users. A skin includes the appearance of the background, menus, text, buttons, lines, and margins.