Glass cutter

A glass cutter is a tool used to make a shallow score in one surface of a piece of glass that is to be broken in two pieces. The scoring makes a split in the surface of the glass which encourages the glass to break along the score. Regular, annealed glass can be broken apart this way but not tempered glass as the latter tends to shatter rather than breaking cleanly into two pieces.

"Glass Cutter" is a digital single made available on Prince's website NPG Music Club on April 5, 2005 (with the demo released a year before). The "virtual B-side" was "San Jose Jam".