The red Glass Saver edition of our Side Piece corner cards are the latest in material innovation from Fusion Tools®. These extremely hard corner cards are designed for cleaning glass surfaces without scratching the delicate treated surfaces of automotive, commercial, and residential glass manufacturers. What sets the Glass Savers apart from any other industry material is the unique ability to sharpen and resurface the scraping edge of the tool by running a razor knife along the edge and polishing it on any regular brown box. We offer two convenient styles for any installers preferred tool grip. This hard material is not designed for installing film, only for scraping glass without fear of damaging your clients glass.